/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:04:17,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:04:17,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:04:17,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 05:04:17,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 05:04:17,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 05:04:17,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 05:04:17,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 05:04:17,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 05:04:17,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 05:04:17,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 05:04:17,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 05:04:17,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 05:04:17,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 05:04:17,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 05:04:17,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 05:04:17,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 05:04:17,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 05:04:17,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 05:04:17,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 05:04:17,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 05:04:17,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 05:04:17,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 05:04:17,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 05:04:17,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 05:04:17,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:04:17,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:04:17,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:04:17,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 05:04:17,963 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:04:17,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:04:17,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:04:17,964 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:04:17,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:04:17,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:04:17,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:04:17,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:04:17,965 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:04:17,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:04:17,966 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:04:17,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:04:17,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:04:17,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:04:17,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:04:17,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:04:17,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:04:17,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:04:17,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:04:17,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:04:17,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:04:17,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:04:17,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:04:17,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:04:17,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:04:17,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:04:18,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:04:18,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:04:18,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:04:18,201 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:04:18,202 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:04:18,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2022-01-18 05:04:18,203 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2022-01-18 05:04:18,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:04:18,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:04:18,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:04:18,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:04:18,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:04:18,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,261 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:04:18,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:04:18,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:04:18,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:04:18,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:04:18,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:04:18,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:04:18,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:04:18,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:04:18,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/1) ... [2022-01-18 05:04:18,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:04:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:18,336 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) [2022-01-18 05:04:18,342 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 [2022-01-18 05:04:18,370 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:04:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:04:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:04:18,370 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:04:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:04:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:04:18,371 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:04:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:04:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:04:18,372 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 05:04:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 05:04:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 05:04:18,373 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 05:04:18,426 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:04:18,427 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:04:18,552 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:04:18,620 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:04:18,620 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-18 05:04:18,622 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:04:18 BoogieIcfgContainer [2022-01-18 05:04:18,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:04:18,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:04:18,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:04:18,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:04:18,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:04:18" (1/2) ... [2022-01-18 05:04:18,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4836ea47 and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:04:18, skipping insertion in model container [2022-01-18 05:04:18,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:04:18" (2/2) ... [2022-01-18 05:04:18,644 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2022-01-18 05:04:18,647 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:04:18,647 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:04:18,648 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:04:18,648 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:04:18,681 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 05:04:18,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:04:18,720 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 05:04:18,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 05:04:18,731 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2022-01-18 05:04:18,780 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:04:18,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:18,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:18,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:18,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash -29429742, now seen corresponding path program 1 times [2022-01-18 05:04:18,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:18,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091643998] [2022-01-18 05:04:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:18,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:19,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091643998] [2022-01-18 05:04:19,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091643998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:19,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:19,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:19,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048313273] [2022-01-18 05:04:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:19,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:19,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:19,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:19,246 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:19,520 INFO L93 Difference]: Finished difference Result 277 states and 874 transitions. [2022-01-18 05:04:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:04:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:04:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:19,535 INFO L225 Difference]: With dead ends: 277 [2022-01-18 05:04:19,535 INFO L226 Difference]: Without dead ends: 262 [2022-01-18 05:04:19,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:04:19,543 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:19,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-18 05:04:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 126. [2022-01-18 05:04:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2022-01-18 05:04:19,590 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2022-01-18 05:04:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:19,591 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2022-01-18 05:04:19,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2022-01-18 05:04:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:04:19,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:19,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:19,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:04:19,594 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1669447950, now seen corresponding path program 2 times [2022-01-18 05:04:19,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:19,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682608697] [2022-01-18 05:04:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:19,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:19,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:19,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682608697] [2022-01-18 05:04:19,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682608697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:19,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:19,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:19,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113655424] [2022-01-18 05:04:19,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:19,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:19,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:19,713 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:19,896 INFO L93 Difference]: Finished difference Result 257 states and 779 transitions. [2022-01-18 05:04:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:04:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:04:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:19,901 INFO L225 Difference]: With dead ends: 257 [2022-01-18 05:04:19,901 INFO L226 Difference]: Without dead ends: 242 [2022-01-18 05:04:19,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:04:19,909 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:19,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-18 05:04:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 132. [2022-01-18 05:04:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2022-01-18 05:04:19,931 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2022-01-18 05:04:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:19,932 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2022-01-18 05:04:19,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2022-01-18 05:04:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:04:19,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:19,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:19,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 05:04:19,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash 332003462, now seen corresponding path program 3 times [2022-01-18 05:04:19,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:19,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78522258] [2022-01-18 05:04:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:19,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:20,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:20,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78522258] [2022-01-18 05:04:20,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78522258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:20,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:20,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:20,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61626719] [2022-01-18 05:04:20,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:20,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:20,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:20,147 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:20,361 INFO L93 Difference]: Finished difference Result 411 states and 1319 transitions. [2022-01-18 05:04:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:04:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:04:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:20,365 INFO L225 Difference]: With dead ends: 411 [2022-01-18 05:04:20,365 INFO L226 Difference]: Without dead ends: 396 [2022-01-18 05:04:20,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:04:20,366 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:20,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 35 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-18 05:04:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 140. [2022-01-18 05:04:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-01-18 05:04:20,379 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-01-18 05:04:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:20,379 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-01-18 05:04:20,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-01-18 05:04:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:04:20,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:20,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:20,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 05:04:20,381 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash -198832182, now seen corresponding path program 4 times [2022-01-18 05:04:20,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:20,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461995307] [2022-01-18 05:04:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:20,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:20,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:20,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461995307] [2022-01-18 05:04:20,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461995307] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:20,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:20,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:20,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479487373] [2022-01-18 05:04:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:20,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:20,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:20,497 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:20,713 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2022-01-18 05:04:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:04:20,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:04:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:20,715 INFO L225 Difference]: With dead ends: 264 [2022-01-18 05:04:20,715 INFO L226 Difference]: Without dead ends: 249 [2022-01-18 05:04:20,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:04:20,716 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:20,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 30 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-18 05:04:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2022-01-18 05:04:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-01-18 05:04:20,724 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-01-18 05:04:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:20,724 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-01-18 05:04:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-01-18 05:04:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:04:20,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:20,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:20,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 05:04:20,726 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1457604362, now seen corresponding path program 5 times [2022-01-18 05:04:20,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:20,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459888114] [2022-01-18 05:04:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:20,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:20,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:20,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459888114] [2022-01-18 05:04:20,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459888114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:20,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:20,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:20,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548858455] [2022-01-18 05:04:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:20,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:20,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:20,851 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,072 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2022-01-18 05:04:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:04:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:04:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,075 INFO L225 Difference]: With dead ends: 229 [2022-01-18 05:04:21,075 INFO L226 Difference]: Without dead ends: 214 [2022-01-18 05:04:21,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:04:21,076 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:21,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 31 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:21,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-18 05:04:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2022-01-18 05:04:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-01-18 05:04:21,084 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-01-18 05:04:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,084 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-01-18 05:04:21,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-01-18 05:04:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:04:21,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:21,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 05:04:21,085 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1842890102, now seen corresponding path program 6 times [2022-01-18 05:04:21,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926254817] [2022-01-18 05:04:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:21,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:21,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926254817] [2022-01-18 05:04:21,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926254817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:21,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:21,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:21,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005651481] [2022-01-18 05:04:21,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:21,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:21,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:21,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:21,201 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,502 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2022-01-18 05:04:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:04:21,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:04:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,505 INFO L225 Difference]: With dead ends: 336 [2022-01-18 05:04:21,505 INFO L226 Difference]: Without dead ends: 321 [2022-01-18 05:04:21,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:04:21,506 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:21,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-18 05:04:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2022-01-18 05:04:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-01-18 05:04:21,514 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-01-18 05:04:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,515 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-01-18 05:04:21,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-01-18 05:04:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 05:04:21,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:21,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 05:04:21,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1236732740, now seen corresponding path program 1 times [2022-01-18 05:04:21,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530278057] [2022-01-18 05:04:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:21,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:21,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530278057] [2022-01-18 05:04:21,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530278057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:21,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:21,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:04:21,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689188636] [2022-01-18 05:04:21,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:21,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:04:21,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:21,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:04:21,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:04:21,536 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-01-18 05:04:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,564 INFO L93 Difference]: Finished difference Result 163 states and 538 transitions. [2022-01-18 05:04:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:04:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2022-01-18 05:04:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,566 INFO L225 Difference]: With dead ends: 163 [2022-01-18 05:04:21,566 INFO L226 Difference]: Without dead ends: 163 [2022-01-18 05:04:21,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:04:21,567 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:21,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-18 05:04:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-01-18 05:04:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.3209876543209877) internal successors, (538), 162 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 538 transitions. [2022-01-18 05:04:21,573 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 538 transitions. Word has length 15 [2022-01-18 05:04:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,573 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 538 transitions. [2022-01-18 05:04:21,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-01-18 05:04:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 538 transitions. [2022-01-18 05:04:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 05:04:21,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:21,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 05:04:21,575 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1228810757, now seen corresponding path program 1 times [2022-01-18 05:04:21,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899751867] [2022-01-18 05:04:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:21,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899751867] [2022-01-18 05:04:21,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899751867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:21,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:21,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:04:21,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868750986] [2022-01-18 05:04:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:21,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:04:21,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:04:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:04:21,593 INFO L87 Difference]: Start difference. First operand 163 states and 538 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-01-18 05:04:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,622 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2022-01-18 05:04:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:04:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2022-01-18 05:04:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,624 INFO L225 Difference]: With dead ends: 192 [2022-01-18 05:04:21,624 INFO L226 Difference]: Without dead ends: 192 [2022-01-18 05:04:21,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:04:21,625 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:21,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-18 05:04:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-18 05:04:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 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) [2022-01-18 05:04:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2022-01-18 05:04:21,632 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2022-01-18 05:04:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,632 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2022-01-18 05:04:21,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-01-18 05:04:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2022-01-18 05:04:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 05:04:21,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:21,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 05:04:21,634 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1075245774, now seen corresponding path program 1 times [2022-01-18 05:04:21,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697925279] [2022-01-18 05:04:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:21,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697925279] [2022-01-18 05:04:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697925279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:21,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:21,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:04:21,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380738089] [2022-01-18 05:04:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:21,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:04:21,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:04:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:04:21,653 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-01-18 05:04:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,682 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2022-01-18 05:04:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:04:21,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2022-01-18 05:04:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,684 INFO L225 Difference]: With dead ends: 223 [2022-01-18 05:04:21,684 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 05:04:21,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:04:21,685 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:21,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 05:04:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-01-18 05:04:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 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) [2022-01-18 05:04:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2022-01-18 05:04:21,693 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2022-01-18 05:04:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,693 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2022-01-18 05:04:21,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-01-18 05:04:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2022-01-18 05:04:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:21,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:21,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 05:04:21,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,695 INFO L85 PathProgramCache]: Analyzing trace with hash -8420014, now seen corresponding path program 1 times [2022-01-18 05:04:21,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809259476] [2022-01-18 05:04:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:21,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:21,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809259476] [2022-01-18 05:04:21,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809259476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:21,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:21,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:21,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472585762] [2022-01-18 05:04:21,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:21,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:21,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:21,738 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,835 INFO L93 Difference]: Finished difference Result 571 states and 1745 transitions. [2022-01-18 05:04:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:04:21,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 05:04:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,839 INFO L225 Difference]: With dead ends: 571 [2022-01-18 05:04:21,839 INFO L226 Difference]: Without dead ends: 495 [2022-01-18 05:04:21,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:04:21,840 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:21,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 28 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-18 05:04:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2022-01-18 05:04:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2672413793103448) internal successors, (758), 232 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 758 transitions. [2022-01-18 05:04:21,850 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 758 transitions. Word has length 16 [2022-01-18 05:04:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,850 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 758 transitions. [2022-01-18 05:04:21,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 758 transitions. [2022-01-18 05:04:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:21,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:21,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-18 05:04:21,851 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 245083442, now seen corresponding path program 1 times [2022-01-18 05:04:21,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021446750] [2022-01-18 05:04:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:21,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:21,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021446750] [2022-01-18 05:04:21,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021446750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:21,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:21,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:21,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696845213] [2022-01-18 05:04:21,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:21,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:21,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:21,892 INFO L87 Difference]: Start difference. First operand 233 states and 758 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,963 INFO L93 Difference]: Finished difference Result 403 states and 1190 transitions. [2022-01-18 05:04:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:04:21,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 05:04:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,966 INFO L225 Difference]: With dead ends: 403 [2022-01-18 05:04:21,966 INFO L226 Difference]: Without dead ends: 355 [2022-01-18 05:04:21,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:04:21,967 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:21,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-18 05:04:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 233. [2022-01-18 05:04:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2022-01-18 05:04:21,976 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2022-01-18 05:04:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,976 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2022-01-18 05:04:21,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2022-01-18 05:04:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:21,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:21,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 05:04:21,977 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1080130578, now seen corresponding path program 2 times [2022-01-18 05:04:21,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543972476] [2022-01-18 05:04:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:22,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543972476] [2022-01-18 05:04:22,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543972476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:22,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:22,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:04:22,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568202702] [2022-01-18 05:04:22,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:22,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:04:22,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:04:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:04:22,018 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:22,071 INFO L93 Difference]: Finished difference Result 347 states and 1054 transitions. [2022-01-18 05:04:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:04:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 05:04:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:22,073 INFO L225 Difference]: With dead ends: 347 [2022-01-18 05:04:22,073 INFO L226 Difference]: Without dead ends: 283 [2022-01-18 05:04:22,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:04:22,074 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:22,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-18 05:04:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-01-18 05:04:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.2620087336244543) internal successors, (747), 229 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 747 transitions. [2022-01-18 05:04:22,083 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 747 transitions. Word has length 16 [2022-01-18 05:04:22,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:22,083 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 747 transitions. [2022-01-18 05:04:22,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 747 transitions. [2022-01-18 05:04:22,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:22,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:22,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:22,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 05:04:22,085 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash 94528582, now seen corresponding path program 1 times [2022-01-18 05:04:22,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:22,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251139511] [2022-01-18 05:04:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:22,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:22,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251139511] [2022-01-18 05:04:22,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251139511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015234489] [2022-01-18 05:04:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:22,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:22,122 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) [2022-01-18 05:04:22,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 05:04:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:22,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:04:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:22,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:22,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015234489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:22,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:22,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-01-18 05:04:22,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783134076] [2022-01-18 05:04:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:22,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:04:22,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:22,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:04:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:04:22,548 INFO L87 Difference]: Start difference. First operand 230 states and 747 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2022-01-18 05:04:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:22,703 INFO L93 Difference]: Finished difference Result 529 states and 1519 transitions. [2022-01-18 05:04:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:04:22,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 16 [2022-01-18 05:04:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:22,706 INFO L225 Difference]: With dead ends: 529 [2022-01-18 05:04:22,706 INFO L226 Difference]: Without dead ends: 455 [2022-01-18 05:04:22,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:04:22,707 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:22,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 45 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:04:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-18 05:04:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2022-01-18 05:04:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1380753138075312) internal successors, (750), 239 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 750 transitions. [2022-01-18 05:04:22,716 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 750 transitions. Word has length 16 [2022-01-18 05:04:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:22,717 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 750 transitions. [2022-01-18 05:04:22,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2022-01-18 05:04:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 750 transitions. [2022-01-18 05:04:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:22,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:22,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:22,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:22,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 05:04:22,919 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -757483642, now seen corresponding path program 2 times [2022-01-18 05:04:22,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:22,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199960505] [2022-01-18 05:04:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:22,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:22,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:22,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199960505] [2022-01-18 05:04:22,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199960505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:22,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:22,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:04:22,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666893546] [2022-01-18 05:04:22,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:22,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:04:22,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:04:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:04:22,946 INFO L87 Difference]: Start difference. First operand 240 states and 750 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:22,988 INFO L93 Difference]: Finished difference Result 343 states and 1000 transitions. [2022-01-18 05:04:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:04:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 05:04:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:22,990 INFO L225 Difference]: With dead ends: 343 [2022-01-18 05:04:22,990 INFO L226 Difference]: Without dead ends: 273 [2022-01-18 05:04:22,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:04:22,992 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:22,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-18 05:04:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 242. [2022-01-18 05:04:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.087136929460581) internal successors, (744), 241 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 744 transitions. [2022-01-18 05:04:22,999 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 744 transitions. Word has length 16 [2022-01-18 05:04:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:22,999 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 744 transitions. [2022-01-18 05:04:22,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 744 transitions. [2022-01-18 05:04:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:23,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:23,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:23,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-18 05:04:23,001 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash -472042042, now seen corresponding path program 2 times [2022-01-18 05:04:23,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:23,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273766930] [2022-01-18 05:04:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:23,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:23,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:23,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273766930] [2022-01-18 05:04:23,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273766930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:23,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:23,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:23,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300267101] [2022-01-18 05:04:23,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:23,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:23,037 INFO L87 Difference]: Start difference. First operand 242 states and 744 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:23,085 INFO L93 Difference]: Finished difference Result 310 states and 888 transitions. [2022-01-18 05:04:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:04:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 05:04:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:23,088 INFO L225 Difference]: With dead ends: 310 [2022-01-18 05:04:23,088 INFO L226 Difference]: Without dead ends: 269 [2022-01-18 05:04:23,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:04:23,089 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:23,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-18 05:04:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 238. [2022-01-18 05:04:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.1054852320675104) internal successors, (736), 237 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) [2022-01-18 05:04:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 736 transitions. [2022-01-18 05:04:23,097 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 736 transitions. Word has length 16 [2022-01-18 05:04:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:23,097 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 736 transitions. [2022-01-18 05:04:23,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 736 transitions. [2022-01-18 05:04:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:23,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:23,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:23,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 05:04:23,098 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1203369498, now seen corresponding path program 3 times [2022-01-18 05:04:23,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:23,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861741346] [2022-01-18 05:04:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:23,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:23,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861741346] [2022-01-18 05:04:23,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861741346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:23,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:23,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:04:23,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527003423] [2022-01-18 05:04:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:23,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:04:23,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:04:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:04:23,135 INFO L87 Difference]: Start difference. First operand 238 states and 736 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:23,175 INFO L93 Difference]: Finished difference Result 281 states and 840 transitions. [2022-01-18 05:04:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:04:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 05:04:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:23,176 INFO L225 Difference]: With dead ends: 281 [2022-01-18 05:04:23,176 INFO L226 Difference]: Without dead ends: 209 [2022-01-18 05:04:23,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:23,177 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:23,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 14 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-18 05:04:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-18 05:04:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2022-01-18 05:04:23,183 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2022-01-18 05:04:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2022-01-18 05:04:23,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2022-01-18 05:04:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:04:23,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:23,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:23,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-18 05:04:23,186 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 402212618, now seen corresponding path program 3 times [2022-01-18 05:04:23,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:23,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123080629] [2022-01-18 05:04:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:23,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:23,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:23,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123080629] [2022-01-18 05:04:23,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123080629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:04:23,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:04:23,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:04:23,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690883457] [2022-01-18 05:04:23,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:04:23,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:04:23,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:23,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:04:23,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:04:23,223 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:23,276 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2022-01-18 05:04:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:04:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 05:04:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:23,279 INFO L225 Difference]: With dead ends: 238 [2022-01-18 05:04:23,279 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 05:04:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:04:23,280 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:04:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 05:04:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-01-18 05:04:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-18 05:04:23,290 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2022-01-18 05:04:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:23,290 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-18 05:04:23,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-18 05:04:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:23,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:23,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:23,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-18 05:04:23,291 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1843106918, now seen corresponding path program 1 times [2022-01-18 05:04:23,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:23,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619406032] [2022-01-18 05:04:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:23,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:23,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:23,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619406032] [2022-01-18 05:04:23,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619406032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:23,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372280440] [2022-01-18 05:04:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:23,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:23,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:23,540 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) [2022-01-18 05:04:23,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 05:04:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 05:04:23,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:24,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-01-18 05:04:24,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 146 [2022-01-18 05:04:24,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 132 [2022-01-18 05:04:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:25,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:25,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:04:26,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:26,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 285 [2022-01-18 05:04:26,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 241 [2022-01-18 05:04:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:26,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372280440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:26,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:26,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2022-01-18 05:04:26,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977283153] [2022-01-18 05:04:26,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:26,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:04:26,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:04:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:04:26,801 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:36,404 INFO L93 Difference]: Finished difference Result 1601 states and 4410 transitions. [2022-01-18 05:04:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 05:04:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:36,419 INFO L225 Difference]: With dead ends: 1601 [2022-01-18 05:04:36,419 INFO L226 Difference]: Without dead ends: 1265 [2022-01-18 05:04:36,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1903, Invalid=6653, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 05:04:36,421 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 465 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:36,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 558 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 05:04:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-01-18 05:04:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 356. [2022-01-18 05:04:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.101408450704225) internal successors, (1101), 355 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1101 transitions. [2022-01-18 05:04:36,440 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1101 transitions. Word has length 20 [2022-01-18 05:04:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:36,440 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1101 transitions. [2022-01-18 05:04:36,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1101 transitions. [2022-01-18 05:04:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:36,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:36,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:36,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:36,664 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,SelfDestructingSolverStorable17 [2022-01-18 05:04:36,664 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:36,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1724935778, now seen corresponding path program 2 times [2022-01-18 05:04:36,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:36,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718258646] [2022-01-18 05:04:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:36,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:36,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:36,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718258646] [2022-01-18 05:04:36,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718258646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:36,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620687436] [2022-01-18 05:04:36,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:36,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:36,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:36,816 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) [2022-01-18 05:04:36,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 05:04:36,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:04:36,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:36,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:04:37,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 182 [2022-01-18 05:04:37,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 160 [2022-01-18 05:04:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:37,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:37,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:04:38,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-01-18 05:04:38,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:38,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 163 [2022-01-18 05:04:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:38,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620687436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:38,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:38,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:04:38,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816897801] [2022-01-18 05:04:38,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:38,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:04:38,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:04:38,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:04:38,412 INFO L87 Difference]: Start difference. First operand 356 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:39,712 INFO L93 Difference]: Finished difference Result 1024 states and 2998 transitions. [2022-01-18 05:04:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:04:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:39,716 INFO L225 Difference]: With dead ends: 1024 [2022-01-18 05:04:39,716 INFO L226 Difference]: Without dead ends: 851 [2022-01-18 05:04:39,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:04:39,717 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 227 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:39,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 228 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:04:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-01-18 05:04:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 405. [2022-01-18 05:04:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.1534653465346536) internal successors, (1274), 404 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1274 transitions. [2022-01-18 05:04:39,730 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1274 transitions. Word has length 20 [2022-01-18 05:04:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:39,730 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1274 transitions. [2022-01-18 05:04:39,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1274 transitions. [2022-01-18 05:04:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:39,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:39,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:39,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:39,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:39,954 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1025069888, now seen corresponding path program 3 times [2022-01-18 05:04:39,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:39,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140009821] [2022-01-18 05:04:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:39,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:40,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140009821] [2022-01-18 05:04:40,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140009821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715296728] [2022-01-18 05:04:40,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:40,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:40,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:40,112 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) [2022-01-18 05:04:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 05:04:40,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:04:40,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:04:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:40,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:04:40,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:04:40,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 139 [2022-01-18 05:04:40,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 121 [2022-01-18 05:04:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:40,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:41,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 277 [2022-01-18 05:04:41,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 277 [2022-01-18 05:04:41,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:41,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 276 [2022-01-18 05:04:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:42,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715296728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:42,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:42,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-01-18 05:04:42,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915560425] [2022-01-18 05:04:42,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:42,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:42,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:42,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:42,145 INFO L87 Difference]: Start difference. First operand 405 states and 1274 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:43,019 INFO L93 Difference]: Finished difference Result 823 states and 2471 transitions. [2022-01-18 05:04:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:04:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:43,023 INFO L225 Difference]: With dead ends: 823 [2022-01-18 05:04:43,023 INFO L226 Difference]: Without dead ends: 681 [2022-01-18 05:04:43,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:04:43,024 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:43,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 211 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:04:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-18 05:04:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 434. [2022-01-18 05:04:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.187066974595843) internal successors, (1380), 433 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1380 transitions. [2022-01-18 05:04:43,036 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1380 transitions. Word has length 20 [2022-01-18 05:04:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:43,036 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1380 transitions. [2022-01-18 05:04:43,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1380 transitions. [2022-01-18 05:04:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:43,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:43,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:43,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:43,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:43,260 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1109587362, now seen corresponding path program 4 times [2022-01-18 05:04:43,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496119419] [2022-01-18 05:04:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:43,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:43,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496119419] [2022-01-18 05:04:43,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496119419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043252732] [2022-01-18 05:04:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:43,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:43,386 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) [2022-01-18 05:04:43,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:04:43,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:43,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:04:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:43,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 226 [2022-01-18 05:04:44,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:04:44,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 145 [2022-01-18 05:04:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:44,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:44,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:04:45,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:45,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 248 [2022-01-18 05:04:45,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 199 [2022-01-18 05:04:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:45,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043252732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:45,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:45,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-01-18 05:04:45,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945322115] [2022-01-18 05:04:45,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:45,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:04:45,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:04:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:04:45,599 INFO L87 Difference]: Start difference. First operand 434 states and 1380 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:46,347 INFO L93 Difference]: Finished difference Result 796 states and 2402 transitions. [2022-01-18 05:04:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:04:46,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:46,351 INFO L225 Difference]: With dead ends: 796 [2022-01-18 05:04:46,351 INFO L226 Difference]: Without dead ends: 718 [2022-01-18 05:04:46,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:04:46,352 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:46,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 157 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:04:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-18 05:04:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 463. [2022-01-18 05:04:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.2554112554112553) internal successors, (1504), 462 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1504 transitions. [2022-01-18 05:04:46,365 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1504 transitions. Word has length 20 [2022-01-18 05:04:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:46,366 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1504 transitions. [2022-01-18 05:04:46,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1504 transitions. [2022-01-18 05:04:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:46,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:46,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:46,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:46,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:46,583 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1573545142, now seen corresponding path program 5 times [2022-01-18 05:04:46,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:46,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691028746] [2022-01-18 05:04:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:46,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:46,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691028746] [2022-01-18 05:04:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691028746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886721629] [2022-01-18 05:04:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:46,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:46,819 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) [2022-01-18 05:04:46,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:04:46,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:46,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:46,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:04:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:47,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 268 [2022-01-18 05:04:47,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 131 [2022-01-18 05:04:47,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 113 [2022-01-18 05:04:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:47,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:47,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-01-18 05:04:48,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:48,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 263 [2022-01-18 05:04:48,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 208 [2022-01-18 05:04:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:48,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886721629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:48,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:48,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-01-18 05:04:48,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855605723] [2022-01-18 05:04:48,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:48,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:04:48,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:04:48,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:04:48,460 INFO L87 Difference]: Start difference. First operand 463 states and 1504 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:49,417 INFO L93 Difference]: Finished difference Result 798 states and 2519 transitions. [2022-01-18 05:04:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:04:49,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:49,421 INFO L225 Difference]: With dead ends: 798 [2022-01-18 05:04:49,421 INFO L226 Difference]: Without dead ends: 751 [2022-01-18 05:04:49,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:04:49,422 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:49,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 256 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:04:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-18 05:04:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 463. [2022-01-18 05:04:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.2554112554112553) internal successors, (1504), 462 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1504 transitions. [2022-01-18 05:04:49,434 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1504 transitions. Word has length 20 [2022-01-18 05:04:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:49,434 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1504 transitions. [2022-01-18 05:04:49,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1504 transitions. [2022-01-18 05:04:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:49,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:49,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:49,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 05:04:49,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:49,650 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash 279619950, now seen corresponding path program 6 times [2022-01-18 05:04:49,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:49,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373295521] [2022-01-18 05:04:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:49,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:49,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373295521] [2022-01-18 05:04:49,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373295521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348785721] [2022-01-18 05:04:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:49,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:49,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:49,770 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) [2022-01-18 05:04:49,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:04:49,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:04:49,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:04:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:49,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:04:50,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:04:50,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 283 [2022-01-18 05:04:50,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 242 [2022-01-18 05:04:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:50,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:51,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 277 [2022-01-18 05:04:51,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:51,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 165 [2022-01-18 05:04:51,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 132 [2022-01-18 05:04:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:52,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348785721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:52,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:52,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:04:52,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456480976] [2022-01-18 05:04:52,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:52,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:52,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:52,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:52,020 INFO L87 Difference]: Start difference. First operand 463 states and 1504 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:53,569 INFO L93 Difference]: Finished difference Result 1364 states and 3906 transitions. [2022-01-18 05:04:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:04:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:53,573 INFO L225 Difference]: With dead ends: 1364 [2022-01-18 05:04:53,573 INFO L226 Difference]: Without dead ends: 902 [2022-01-18 05:04:53,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:04:53,574 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 202 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:53,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 351 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 894 Invalid, 0 Unknown, 335 Unchecked, 0.4s Time] [2022-01-18 05:04:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-18 05:04:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 519. [2022-01-18 05:04:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.2104247104247103) internal successors, (1663), 518 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1663 transitions. [2022-01-18 05:04:53,588 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1663 transitions. Word has length 20 [2022-01-18 05:04:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:53,588 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1663 transitions. [2022-01-18 05:04:53,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1663 transitions. [2022-01-18 05:04:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:53,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:53,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:53,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:53,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:53,811 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1851584084, now seen corresponding path program 7 times [2022-01-18 05:04:53,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:53,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063851627] [2022-01-18 05:04:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:53,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:53,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:53,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063851627] [2022-01-18 05:04:53,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063851627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:53,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958722355] [2022-01-18 05:04:53,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:53,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:53,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:53,940 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) [2022-01-18 05:04:53,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:04:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:04:53,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:54,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-01-18 05:04:54,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:04:54,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 05:04:54,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-01-18 05:04:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:54,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:54,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 178 [2022-01-18 05:04:55,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2022-01-18 05:04:55,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:55,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 223 [2022-01-18 05:04:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:55,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958722355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:55,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:55,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:04:55,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134394693] [2022-01-18 05:04:55,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:55,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:55,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:55,720 INFO L87 Difference]: Start difference. First operand 519 states and 1663 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:56,009 INFO L93 Difference]: Finished difference Result 765 states and 2403 transitions. [2022-01-18 05:04:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:04:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:56,013 INFO L225 Difference]: With dead ends: 765 [2022-01-18 05:04:56,013 INFO L226 Difference]: Without dead ends: 706 [2022-01-18 05:04:56,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:04:56,014 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:56,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 173 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 399 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-01-18 05:04:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-18 05:04:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 543. [2022-01-18 05:04:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 3.215867158671587) internal successors, (1743), 542 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) [2022-01-18 05:04:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1743 transitions. [2022-01-18 05:04:56,026 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1743 transitions. Word has length 20 [2022-01-18 05:04:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:56,027 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1743 transitions. [2022-01-18 05:04:56,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1743 transitions. [2022-01-18 05:04:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:56,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:56,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:56,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:56,244 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,SelfDestructingSolverStorable23 [2022-01-18 05:04:56,244 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1029232930, now seen corresponding path program 8 times [2022-01-18 05:04:56,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:56,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310991215] [2022-01-18 05:04:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:56,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:56,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310991215] [2022-01-18 05:04:56,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310991215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203852059] [2022-01-18 05:04:56,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:56,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:56,392 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) [2022-01-18 05:04:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:04:56,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:56,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:04:56,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:56,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:04:56,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:04:56,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:04:56,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:04:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:57,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:57,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 214 [2022-01-18 05:04:57,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:57,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 217 [2022-01-18 05:04:57,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 184 [2022-01-18 05:04:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203852059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:58,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-01-18 05:04:58,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384186099] [2022-01-18 05:04:58,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:58,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:58,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:58,226 INFO L87 Difference]: Start difference. First operand 543 states and 1743 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:59,133 INFO L93 Difference]: Finished difference Result 1160 states and 3490 transitions. [2022-01-18 05:04:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:04:59,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:04:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:59,137 INFO L225 Difference]: With dead ends: 1160 [2022-01-18 05:04:59,137 INFO L226 Difference]: Without dead ends: 948 [2022-01-18 05:04:59,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:04:59,139 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 153 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:59,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 356 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 624 Invalid, 0 Unknown, 246 Unchecked, 0.3s Time] [2022-01-18 05:04:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-18 05:04:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 625. [2022-01-18 05:04:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.176282051282051) internal successors, (1982), 624 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1982 transitions. [2022-01-18 05:04:59,153 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1982 transitions. Word has length 20 [2022-01-18 05:04:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:59,154 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1982 transitions. [2022-01-18 05:04:59,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:04:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1982 transitions. [2022-01-18 05:04:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:59,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:59,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:59,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:59,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 05:04:59,369 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash -429455834, now seen corresponding path program 9 times [2022-01-18 05:04:59,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:59,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514829038] [2022-01-18 05:04:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:59,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:59,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:59,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514829038] [2022-01-18 05:04:59,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514829038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:59,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606899327] [2022-01-18 05:04:59,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:59,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:59,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:59,469 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) [2022-01-18 05:04:59,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:04:59,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:04:59,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:04:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:59,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:04:59,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 158 [2022-01-18 05:04:59,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-01-18 05:04:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:04:59,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:00,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-01-18 05:05:00,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:05:00,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:00,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 141 [2022-01-18 05:05:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:00,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606899327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:00,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:00,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:05:00,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590002014] [2022-01-18 05:05:00,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:00,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:05:00,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:05:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:05:00,643 INFO L87 Difference]: Start difference. First operand 625 states and 1982 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:00,915 INFO L93 Difference]: Finished difference Result 1002 states and 3034 transitions. [2022-01-18 05:05:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:05:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:00,919 INFO L225 Difference]: With dead ends: 1002 [2022-01-18 05:05:00,919 INFO L226 Difference]: Without dead ends: 864 [2022-01-18 05:05:00,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:00,920 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:00,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 118 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:05:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-18 05:05:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 630. [2022-01-18 05:05:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.1748807631160574) internal successors, (1997), 629 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1997 transitions. [2022-01-18 05:05:00,935 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1997 transitions. Word has length 20 [2022-01-18 05:05:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:00,935 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1997 transitions. [2022-01-18 05:05:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1997 transitions. [2022-01-18 05:05:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:00,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:00,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:00,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:01,149 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,SelfDestructingSolverStorable25 [2022-01-18 05:05:01,150 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:01,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:01,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2074195750, now seen corresponding path program 10 times [2022-01-18 05:05:01,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:01,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734936944] [2022-01-18 05:05:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:01,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:01,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:01,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734936944] [2022-01-18 05:05:01,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734936944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:01,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078389219] [2022-01-18 05:05:01,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:01,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:01,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:01,270 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) [2022-01-18 05:05:01,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:05:01,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:01,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:05:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:01,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 146 [2022-01-18 05:05:01,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:05:01,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 139 [2022-01-18 05:05:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:01,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:02,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:02,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 221 [2022-01-18 05:05:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:03,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078389219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:03,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:03,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 21 [2022-01-18 05:05:03,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441253236] [2022-01-18 05:05:03,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:03,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:03,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:03,058 INFO L87 Difference]: Start difference. First operand 630 states and 1997 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:06,256 INFO L93 Difference]: Finished difference Result 1895 states and 5506 transitions. [2022-01-18 05:05:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:05:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:06,262 INFO L225 Difference]: With dead ends: 1895 [2022-01-18 05:05:06,262 INFO L226 Difference]: Without dead ends: 1634 [2022-01-18 05:05:06,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=662, Invalid=2760, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:05:06,263 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 327 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:06,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 492 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:05:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2022-01-18 05:05:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 639. [2022-01-18 05:05:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.1865203761755487) internal successors, (2033), 638 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2033 transitions. [2022-01-18 05:05:06,282 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2033 transitions. Word has length 20 [2022-01-18 05:05:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:06,283 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2033 transitions. [2022-01-18 05:05:06,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2033 transitions. [2022-01-18 05:05:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:06,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:06,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:06,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:06,495 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,SelfDestructingSolverStorable26 [2022-01-18 05:05:06,495 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash -607204812, now seen corresponding path program 11 times [2022-01-18 05:05:06,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:06,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734214059] [2022-01-18 05:05:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:06,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:06,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:06,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734214059] [2022-01-18 05:05:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734214059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:06,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766748734] [2022-01-18 05:05:06,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:06,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:06,606 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) [2022-01-18 05:05:06,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:05:06,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:06,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:06,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:05:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:06,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:05:06,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 147 [2022-01-18 05:05:06,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-01-18 05:05:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:07,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:07,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 294 [2022-01-18 05:05:07,904 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:07,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 290 [2022-01-18 05:05:07,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 236 [2022-01-18 05:05:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:08,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766748734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:08,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:08,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:05:08,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17804885] [2022-01-18 05:05:08,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:08,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:05:08,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:05:08,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:08,071 INFO L87 Difference]: Start difference. First operand 639 states and 2033 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:09,382 INFO L93 Difference]: Finished difference Result 1669 states and 5034 transitions. [2022-01-18 05:05:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:05:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:09,388 INFO L225 Difference]: With dead ends: 1669 [2022-01-18 05:05:09,388 INFO L226 Difference]: Without dead ends: 1402 [2022-01-18 05:05:09,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:05:09,390 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 180 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:09,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 303 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:05:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-01-18 05:05:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 673. [2022-01-18 05:05:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.1651785714285716) internal successors, (2127), 672 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2127 transitions. [2022-01-18 05:05:09,408 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2127 transitions. Word has length 20 [2022-01-18 05:05:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:09,409 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2127 transitions. [2022-01-18 05:05:09,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2127 transitions. [2022-01-18 05:05:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:09,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:09,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:09,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:09,631 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,SelfDestructingSolverStorable27 [2022-01-18 05:05:09,631 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:09,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:09,632 INFO L85 PathProgramCache]: Analyzing trace with hash 557243584, now seen corresponding path program 12 times [2022-01-18 05:05:09,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:09,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317132359] [2022-01-18 05:05:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:09,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:09,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317132359] [2022-01-18 05:05:09,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317132359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347221408] [2022-01-18 05:05:09,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:09,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:09,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:09,763 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) [2022-01-18 05:05:09,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:05:09,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 05:05:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:10,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 197 [2022-01-18 05:05:10,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 76 [2022-01-18 05:05:10,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2022-01-18 05:05:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:10,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:11,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:11,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 176 [2022-01-18 05:05:11,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:11,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 312 [2022-01-18 05:05:11,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:11,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 274 [2022-01-18 05:05:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:12,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347221408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:12,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:12,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 23 [2022-01-18 05:05:12,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109907335] [2022-01-18 05:05:12,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:12,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:05:12,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:12,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:05:12,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:05:12,299 INFO L87 Difference]: Start difference. First operand 673 states and 2127 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:13,988 INFO L93 Difference]: Finished difference Result 1524 states and 4549 transitions. [2022-01-18 05:05:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:05:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:13,994 INFO L225 Difference]: With dead ends: 1524 [2022-01-18 05:05:13,995 INFO L226 Difference]: Without dead ends: 1412 [2022-01-18 05:05:13,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=602, Invalid=2154, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:05:13,996 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:13,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 250 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:05:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-18 05:05:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 677. [2022-01-18 05:05:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1701183431952664) internal successors, (2143), 676 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2143 transitions. [2022-01-18 05:05:14,019 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2143 transitions. Word has length 20 [2022-01-18 05:05:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:14,020 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2143 transitions. [2022-01-18 05:05:14,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2143 transitions. [2022-01-18 05:05:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:14,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:14,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:14,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:14,243 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,SelfDestructingSolverStorable28 [2022-01-18 05:05:14,244 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1016092436, now seen corresponding path program 13 times [2022-01-18 05:05:14,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:14,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276707542] [2022-01-18 05:05:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:14,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:14,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:14,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276707542] [2022-01-18 05:05:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276707542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:14,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231331062] [2022-01-18 05:05:14,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:14,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:14,392 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) [2022-01-18 05:05:14,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:05:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:05:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:14,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-01-18 05:05:14,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:05:14,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 350 treesize of output 292 [2022-01-18 05:05:14,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 251 [2022-01-18 05:05:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:15,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:15,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-01-18 05:05:16,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:16,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 305 [2022-01-18 05:05:16,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 248 [2022-01-18 05:05:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:16,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231331062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:16,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:16,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:05:16,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098464994] [2022-01-18 05:05:16,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:05:16,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:16,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:05:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:16,703 INFO L87 Difference]: Start difference. First operand 677 states and 2143 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:17,380 INFO L93 Difference]: Finished difference Result 1116 states and 3388 transitions. [2022-01-18 05:05:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:05:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:17,383 INFO L225 Difference]: With dead ends: 1116 [2022-01-18 05:05:17,383 INFO L226 Difference]: Without dead ends: 1030 [2022-01-18 05:05:17,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:05:17,384 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 165 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:17,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 131 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 394 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 05:05:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-18 05:05:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 715. [2022-01-18 05:05:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.2100840336134455) internal successors, (2292), 714 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2292 transitions. [2022-01-18 05:05:17,400 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2292 transitions. Word has length 20 [2022-01-18 05:05:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:17,400 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2292 transitions. [2022-01-18 05:05:17,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2292 transitions. [2022-01-18 05:05:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:17,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:17,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:17,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:17,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:17,624 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:17,625 INFO L85 PathProgramCache]: Analyzing trace with hash -574805676, now seen corresponding path program 14 times [2022-01-18 05:05:17,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:17,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338838318] [2022-01-18 05:05:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:17,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:17,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338838318] [2022-01-18 05:05:17,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338838318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516781625] [2022-01-18 05:05:17,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:17,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:17,751 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) [2022-01-18 05:05:17,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:05:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:05:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:17,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-01-18 05:05:18,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 05:05:18,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-01-18 05:05:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:18,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 268 [2022-01-18 05:05:18,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 216 [2022-01-18 05:05:18,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:18,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 199 [2022-01-18 05:05:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:19,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516781625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:19,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:19,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:05:19,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237287605] [2022-01-18 05:05:19,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:19,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:05:19,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:05:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:05:19,366 INFO L87 Difference]: Start difference. First operand 715 states and 2292 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:20,883 INFO L93 Difference]: Finished difference Result 1444 states and 4314 transitions. [2022-01-18 05:05:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:05:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:20,891 INFO L225 Difference]: With dead ends: 1444 [2022-01-18 05:05:20,891 INFO L226 Difference]: Without dead ends: 1247 [2022-01-18 05:05:20,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=1858, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:05:20,892 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 174 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:20,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 333 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:05:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-01-18 05:05:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 721. [2022-01-18 05:05:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.2055555555555557) internal successors, (2308), 720 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2308 transitions. [2022-01-18 05:05:20,910 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2308 transitions. Word has length 20 [2022-01-18 05:05:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2308 transitions. [2022-01-18 05:05:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2308 transitions. [2022-01-18 05:05:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:20,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:20,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:20,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:21,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:21,137 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash 991068458, now seen corresponding path program 15 times [2022-01-18 05:05:21,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:21,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692728861] [2022-01-18 05:05:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:21,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:21,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692728861] [2022-01-18 05:05:21,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692728861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111827628] [2022-01-18 05:05:21,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:21,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:21,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:21,268 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) [2022-01-18 05:05:21,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:05:21,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:05:21,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:05:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:21,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 163 [2022-01-18 05:05:21,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-01-18 05:05:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:05:21,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 190 [2022-01-18 05:05:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:22,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:22,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 212 [2022-01-18 05:05:22,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-01-18 05:05:22,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:22,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 175 [2022-01-18 05:05:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111827628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:23,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:23,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:05:23,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984129528] [2022-01-18 05:05:23,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:23,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:05:23,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:05:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:05:23,175 INFO L87 Difference]: Start difference. First operand 721 states and 2308 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:24,013 INFO L93 Difference]: Finished difference Result 1201 states and 3678 transitions. [2022-01-18 05:05:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:05:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:24,016 INFO L225 Difference]: With dead ends: 1201 [2022-01-18 05:05:24,016 INFO L226 Difference]: Without dead ends: 1060 [2022-01-18 05:05:24,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:05:24,017 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 193 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:24,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 182 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 529 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-18 05:05:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-01-18 05:05:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 758. [2022-01-18 05:05:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.282694848084544) internal successors, (2485), 757 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2485 transitions. [2022-01-18 05:05:24,032 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2485 transitions. Word has length 20 [2022-01-18 05:05:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:24,032 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2485 transitions. [2022-01-18 05:05:24,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2485 transitions. [2022-01-18 05:05:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:24,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:24,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:24,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:24,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:24,260 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash -698874446, now seen corresponding path program 16 times [2022-01-18 05:05:24,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:24,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525486239] [2022-01-18 05:05:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:24,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:24,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:24,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525486239] [2022-01-18 05:05:24,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525486239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:24,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978494384] [2022-01-18 05:05:24,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:24,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:24,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:24,445 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) [2022-01-18 05:05:24,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 05:05:24,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:05:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:24,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 251 [2022-01-18 05:05:25,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:05:25,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 204 [2022-01-18 05:05:25,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-01-18 05:05:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:25,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:25,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-01-18 05:05:26,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:26,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 199 [2022-01-18 05:05:26,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 149 [2022-01-18 05:05:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978494384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:26,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:26,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:05:26,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67106534] [2022-01-18 05:05:26,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:26,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:26,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:26,335 INFO L87 Difference]: Start difference. First operand 758 states and 2485 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:26,930 INFO L93 Difference]: Finished difference Result 1027 states and 3262 transitions. [2022-01-18 05:05:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:05:26,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:26,932 INFO L225 Difference]: With dead ends: 1027 [2022-01-18 05:05:26,933 INFO L226 Difference]: Without dead ends: 976 [2022-01-18 05:05:26,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:05:26,933 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:26,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 187 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 472 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-01-18 05:05:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-18 05:05:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 776. [2022-01-18 05:05:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.2761290322580647) internal successors, (2539), 775 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2539 transitions. [2022-01-18 05:05:26,949 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2539 transitions. Word has length 20 [2022-01-18 05:05:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:26,949 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2539 transitions. [2022-01-18 05:05:26,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2539 transitions. [2022-01-18 05:05:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:26,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:26,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:26,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:27,167 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1194289374, now seen corresponding path program 17 times [2022-01-18 05:05:27,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:27,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284779303] [2022-01-18 05:05:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:27,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:27,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:27,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284779303] [2022-01-18 05:05:27,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284779303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:27,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706125707] [2022-01-18 05:05:27,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:27,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:27,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:27,296 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) [2022-01-18 05:05:27,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 05:05:27,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:27,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 05:05:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:27,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 130 [2022-01-18 05:05:27,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:05:27,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 137 [2022-01-18 05:05:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:28,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:28,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:28,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 183 [2022-01-18 05:05:29,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:29,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2022-01-18 05:05:29,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:29,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 63 [2022-01-18 05:05:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:29,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706125707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:29,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:29,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 25 [2022-01-18 05:05:29,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858202476] [2022-01-18 05:05:29,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:29,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:05:29,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:29,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:05:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:05:29,329 INFO L87 Difference]: Start difference. First operand 776 states and 2539 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:31,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:31,865 INFO L93 Difference]: Finished difference Result 1455 states and 4476 transitions. [2022-01-18 05:05:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:05:31,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:31,869 INFO L225 Difference]: With dead ends: 1455 [2022-01-18 05:05:31,869 INFO L226 Difference]: Without dead ends: 1321 [2022-01-18 05:05:31,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=517, Invalid=3515, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:05:31,871 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 161 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:31,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 644 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:05:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-01-18 05:05:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 770. [2022-01-18 05:05:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.2873862158647595) internal successors, (2528), 769 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2528 transitions. [2022-01-18 05:05:31,889 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2528 transitions. Word has length 20 [2022-01-18 05:05:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:31,889 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2528 transitions. [2022-01-18 05:05:31,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2528 transitions. [2022-01-18 05:05:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:31,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:31,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:31,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:32,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:32,103 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:32,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -80284980, now seen corresponding path program 18 times [2022-01-18 05:05:32,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:32,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326702824] [2022-01-18 05:05:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:32,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:32,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:32,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326702824] [2022-01-18 05:05:32,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326702824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:32,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313078183] [2022-01-18 05:05:32,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:32,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:32,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:32,308 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) [2022-01-18 05:05:32,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 05:05:32,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:05:32,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:05:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:32,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 254 [2022-01-18 05:05:32,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:05:32,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 220 [2022-01-18 05:05:32,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-01-18 05:05:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:33,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:33,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:05:34,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:05:34,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:34,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 153 [2022-01-18 05:05:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:34,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313078183] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:34,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:34,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 05:05:34,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624568679] [2022-01-18 05:05:34,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:34,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:34,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:34,715 INFO L87 Difference]: Start difference. First operand 770 states and 2528 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2022-01-18 05:05:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:36,381 INFO L93 Difference]: Finished difference Result 1412 states and 4258 transitions. [2022-01-18 05:05:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:05:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:36,384 INFO L225 Difference]: With dead ends: 1412 [2022-01-18 05:05:36,384 INFO L226 Difference]: Without dead ends: 1195 [2022-01-18 05:05:36,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:05:36,384 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 204 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:36,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 320 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 791 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-01-18 05:05:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-01-18 05:05:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 801. [2022-01-18 05:05:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.335) internal successors, (2668), 800 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2668 transitions. [2022-01-18 05:05:36,399 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2668 transitions. Word has length 20 [2022-01-18 05:05:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:36,399 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2668 transitions. [2022-01-18 05:05:36,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2022-01-18 05:05:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2668 transitions. [2022-01-18 05:05:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:36,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:36,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:36,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:36,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:36,617 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1737609016, now seen corresponding path program 19 times [2022-01-18 05:05:36,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:36,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466416379] [2022-01-18 05:05:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:36,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:36,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:36,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466416379] [2022-01-18 05:05:36,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466416379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752074683] [2022-01-18 05:05:36,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:36,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:36,772 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) [2022-01-18 05:05:36,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 05:05:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:05:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:36,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:05:37,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 242 [2022-01-18 05:05:37,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 205 [2022-01-18 05:05:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:37,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:37,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 328 treesize of output 288 [2022-01-18 05:05:38,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:38,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 245 [2022-01-18 05:05:38,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 204 [2022-01-18 05:05:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:38,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752074683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:38,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:05:38,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33897942] [2022-01-18 05:05:38,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:05:38,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:05:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:05:38,898 INFO L87 Difference]: Start difference. First operand 801 states and 2668 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:40,745 INFO L93 Difference]: Finished difference Result 1471 states and 4492 transitions. [2022-01-18 05:05:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:05:40,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:05:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:40,749 INFO L225 Difference]: With dead ends: 1471 [2022-01-18 05:05:40,749 INFO L226 Difference]: Without dead ends: 1269 [2022-01-18 05:05:40,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=483, Invalid=2487, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:05:40,750 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 175 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:40,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 479 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:05:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-01-18 05:05:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 830. [2022-01-18 05:05:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.3293124246079615) internal successors, (2760), 829 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2760 transitions. [2022-01-18 05:05:40,769 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2760 transitions. Word has length 20 [2022-01-18 05:05:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:40,769 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2760 transitions. [2022-01-18 05:05:40,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2760 transitions. [2022-01-18 05:05:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:40,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:40,771 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:40,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:40,987 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,SelfDestructingSolverStorable35 [2022-01-18 05:05:40,988 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -456231440, now seen corresponding path program 20 times [2022-01-18 05:05:40,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:40,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033791550] [2022-01-18 05:05:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:40,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:41,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:41,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033791550] [2022-01-18 05:05:41,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033791550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:41,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285448776] [2022-01-18 05:05:41,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:41,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:41,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:41,061 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) [2022-01-18 05:05:41,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 05:05:41,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:41,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:05:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:41,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:05:41,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-01-18 05:05:41,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-01-18 05:05:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:41,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:41,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-01-18 05:05:41,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:05:41,877 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:41,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:05:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:41,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285448776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:41,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:41,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 05:05:41,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327497631] [2022-01-18 05:05:41,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:41,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:05:41,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:05:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:05:41,884 INFO L87 Difference]: Start difference. First operand 830 states and 2760 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2022-01-18 05:05:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:42,181 INFO L93 Difference]: Finished difference Result 1126 states and 3627 transitions. [2022-01-18 05:05:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:05:42,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:42,184 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 05:05:42,184 INFO L226 Difference]: Without dead ends: 1063 [2022-01-18 05:05:42,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:42,185 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:42,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 155 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:05:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-01-18 05:05:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 804. [2022-01-18 05:05:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.3412204234122043) internal successors, (2683), 803 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2683 transitions. [2022-01-18 05:05:42,201 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2683 transitions. Word has length 21 [2022-01-18 05:05:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:42,201 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2683 transitions. [2022-01-18 05:05:42,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2022-01-18 05:05:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2683 transitions. [2022-01-18 05:05:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:42,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:42,203 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:42,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:42,416 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,SelfDestructingSolverStorable36 [2022-01-18 05:05:42,416 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash 970559050, now seen corresponding path program 21 times [2022-01-18 05:05:42,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:42,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315244408] [2022-01-18 05:05:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:42,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:42,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315244408] [2022-01-18 05:05:42,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315244408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:42,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971149104] [2022-01-18 05:05:42,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:42,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:42,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:42,502 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) [2022-01-18 05:05:42,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 05:05:42,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:05:42,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:42,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:05:42,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:42,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:05:42,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-01-18 05:05:42,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-01-18 05:05:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:42,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:42,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-01-18 05:05:43,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:05:43,212 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:43,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:05:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:43,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971149104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:43,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:43,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 05:05:43,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948043488] [2022-01-18 05:05:43,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:43,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:05:43,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:05:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:05:43,217 INFO L87 Difference]: Start difference. First operand 804 states and 2683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-01-18 05:05:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:43,513 INFO L93 Difference]: Finished difference Result 1057 states and 3418 transitions. [2022-01-18 05:05:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:05:43,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:43,516 INFO L225 Difference]: With dead ends: 1057 [2022-01-18 05:05:43,516 INFO L226 Difference]: Without dead ends: 1002 [2022-01-18 05:05:43,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:43,517 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:43,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 145 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:05:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-01-18 05:05:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 806. [2022-01-18 05:05:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.3391304347826085) internal successors, (2688), 805 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2688 transitions. [2022-01-18 05:05:43,534 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2688 transitions. Word has length 21 [2022-01-18 05:05:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:43,535 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 2688 transitions. [2022-01-18 05:05:43,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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) [2022-01-18 05:05:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2688 transitions. [2022-01-18 05:05:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:43,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:43,537 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:43,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:43,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 05:05:43,760 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2146049694, now seen corresponding path program 22 times [2022-01-18 05:05:43,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:43,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846566884] [2022-01-18 05:05:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:43,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:43,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:43,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846566884] [2022-01-18 05:05:43,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846566884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:43,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389547850] [2022-01-18 05:05:43,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:43,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:43,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:43,847 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) [2022-01-18 05:05:43,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 05:05:43,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:43,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:05:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:43,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:05:44,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 185 [2022-01-18 05:05:44,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 165 [2022-01-18 05:05:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:44,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:44,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-01-18 05:05:44,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:05:44,703 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:44,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:05:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:05:44,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389547850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:44,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:44,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 05:05:44,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001407288] [2022-01-18 05:05:44,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:44,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:05:44,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:05:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:05:44,706 INFO L87 Difference]: Start difference. First operand 806 states and 2688 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:44,972 INFO L93 Difference]: Finished difference Result 1152 states and 3679 transitions. [2022-01-18 05:05:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:05:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:44,975 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 05:05:44,975 INFO L226 Difference]: Without dead ends: 1097 [2022-01-18 05:05:44,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:05:44,976 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 167 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:44,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 123 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:05:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-18 05:05:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 821. [2022-01-18 05:05:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.3670731707317074) internal successors, (2761), 820 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2761 transitions. [2022-01-18 05:05:44,993 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2761 transitions. Word has length 21 [2022-01-18 05:05:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:44,993 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 2761 transitions. [2022-01-18 05:05:44,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2761 transitions. [2022-01-18 05:05:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:44,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:44,995 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:45,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 05:05:45,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:45,218 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash -601877648, now seen corresponding path program 23 times [2022-01-18 05:05:45,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:45,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107984856] [2022-01-18 05:05:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:45,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:45,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107984856] [2022-01-18 05:05:45,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107984856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311294312] [2022-01-18 05:05:45,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:45,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:45,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:45,391 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) [2022-01-18 05:05:45,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 05:05:45,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:45,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:05:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:45,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:05:45,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 239 [2022-01-18 05:05:45,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-01-18 05:05:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:45,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:46,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-01-18 05:05:46,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:05:46,443 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:46,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:05:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:46,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311294312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:46,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:46,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-01-18 05:05:46,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546836123] [2022-01-18 05:05:46,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:46,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:05:46,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:05:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:05:46,446 INFO L87 Difference]: Start difference. First operand 821 states and 2761 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-01-18 05:05:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:47,415 INFO L93 Difference]: Finished difference Result 1407 states and 4402 transitions. [2022-01-18 05:05:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:05:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:47,417 INFO L225 Difference]: With dead ends: 1407 [2022-01-18 05:05:47,417 INFO L226 Difference]: Without dead ends: 1293 [2022-01-18 05:05:47,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:05:47,418 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 162 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:47,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 224 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:05:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-01-18 05:05:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 790. [2022-01-18 05:05:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.3333333333333335) internal successors, (2630), 789 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2630 transitions. [2022-01-18 05:05:47,431 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2630 transitions. Word has length 21 [2022-01-18 05:05:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:47,431 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2630 transitions. [2022-01-18 05:05:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-01-18 05:05:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2630 transitions. [2022-01-18 05:05:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:47,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:47,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:47,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:47,636 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,SelfDestructingSolverStorable39 [2022-01-18 05:05:47,636 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1601101796, now seen corresponding path program 24 times [2022-01-18 05:05:47,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266488614] [2022-01-18 05:05:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:47,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:47,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266488614] [2022-01-18 05:05:47,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266488614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869744942] [2022-01-18 05:05:47,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:47,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:47,712 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) [2022-01-18 05:05:47,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 05:05:47,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:47,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:47,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:47,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 05:05:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:47,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:48,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 210 [2022-01-18 05:05:48,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:48,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 05:05:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:48,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869744942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:48,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:48,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:05:48,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109666293] [2022-01-18 05:05:48,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:48,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:05:48,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:48,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:05:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:05:48,322 INFO L87 Difference]: Start difference. First operand 790 states and 2630 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-01-18 05:05:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:48,440 INFO L93 Difference]: Finished difference Result 1071 states and 3482 transitions. [2022-01-18 05:05:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:05:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:48,442 INFO L225 Difference]: With dead ends: 1071 [2022-01-18 05:05:48,442 INFO L226 Difference]: Without dead ends: 1013 [2022-01-18 05:05:48,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:48,443 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:48,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 71 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:05:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-18 05:05:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 867. [2022-01-18 05:05:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.3429561200923787) internal successors, (2895), 866 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2895 transitions. [2022-01-18 05:05:48,457 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2895 transitions. Word has length 21 [2022-01-18 05:05:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2895 transitions. [2022-01-18 05:05:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-01-18 05:05:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2895 transitions. [2022-01-18 05:05:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:48,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:48,459 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:48,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:48,683 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,SelfDestructingSolverStorable40 [2022-01-18 05:05:48,683 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1943351290, now seen corresponding path program 25 times [2022-01-18 05:05:48,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:48,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019197743] [2022-01-18 05:05:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:48,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:48,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:48,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019197743] [2022-01-18 05:05:48,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019197743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:48,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043542854] [2022-01-18 05:05:48,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:48,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:48,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:48,750 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) [2022-01-18 05:05:48,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 05:05:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:48,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:48,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 184 [2022-01-18 05:05:48,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 172 [2022-01-18 05:05:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:49,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:49,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 173 [2022-01-18 05:05:49,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:49,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 05:05:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:49,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043542854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:49,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:49,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:05:49,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048135737] [2022-01-18 05:05:49,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:49,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:05:49,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:05:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:49,566 INFO L87 Difference]: Start difference. First operand 867 states and 2895 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:49,751 INFO L93 Difference]: Finished difference Result 1189 states and 3851 transitions. [2022-01-18 05:05:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:49,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:49,753 INFO L225 Difference]: With dead ends: 1189 [2022-01-18 05:05:49,753 INFO L226 Difference]: Without dead ends: 1128 [2022-01-18 05:05:49,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:49,753 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:49,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 101 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:05:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-01-18 05:05:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 932. [2022-01-18 05:05:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.369495166487648) internal successors, (3137), 931 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3137 transitions. [2022-01-18 05:05:49,771 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3137 transitions. Word has length 21 [2022-01-18 05:05:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:49,771 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 3137 transitions. [2022-01-18 05:05:49,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3137 transitions. [2022-01-18 05:05:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:49,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:49,773 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:49,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 05:05:49,973 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,SelfDestructingSolverStorable41 [2022-01-18 05:05:49,974 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash -677656424, now seen corresponding path program 26 times [2022-01-18 05:05:49,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:49,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913622951] [2022-01-18 05:05:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:49,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:50,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:50,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913622951] [2022-01-18 05:05:50,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913622951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560879667] [2022-01-18 05:05:50,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:50,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:50,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:50,048 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) [2022-01-18 05:05:50,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 05:05:50,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:50,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:50,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2022-01-18 05:05:50,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-01-18 05:05:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:50,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:50,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 173 [2022-01-18 05:05:50,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:50,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 05:05:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:50,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560879667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:50,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:50,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:05:50,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875454881] [2022-01-18 05:05:50,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:50,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:05:50,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:05:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:50,812 INFO L87 Difference]: Start difference. First operand 932 states and 3137 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:50,936 INFO L93 Difference]: Finished difference Result 1216 states and 3914 transitions. [2022-01-18 05:05:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:05:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:50,939 INFO L225 Difference]: With dead ends: 1216 [2022-01-18 05:05:50,939 INFO L226 Difference]: Without dead ends: 1164 [2022-01-18 05:05:50,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:50,939 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:50,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 76 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:05:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-01-18 05:05:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2022-01-18 05:05:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.363134657836645) internal successors, (3047), 906 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3047 transitions. [2022-01-18 05:05:50,956 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3047 transitions. Word has length 21 [2022-01-18 05:05:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:50,956 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 3047 transitions. [2022-01-18 05:05:50,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3047 transitions. [2022-01-18 05:05:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:50,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:50,958 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:50,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 05:05:51,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:51,179 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1741384932, now seen corresponding path program 27 times [2022-01-18 05:05:51,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:51,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824563414] [2022-01-18 05:05:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:51,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:51,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:51,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824563414] [2022-01-18 05:05:51,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824563414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:51,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681116519] [2022-01-18 05:05:51,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:51,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:51,237 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) [2022-01-18 05:05:51,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 05:05:51,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:05:51,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:51,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:51,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:05:51,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 05:05:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:51,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:51,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 269 [2022-01-18 05:05:51,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:51,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 246 [2022-01-18 05:05:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:52,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681116519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:52,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:52,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:05:52,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061336440] [2022-01-18 05:05:52,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:52,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:05:52,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:05:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:52,222 INFO L87 Difference]: Start difference. First operand 907 states and 3047 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:52,386 INFO L93 Difference]: Finished difference Result 1154 states and 3727 transitions. [2022-01-18 05:05:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:05:52,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:52,388 INFO L225 Difference]: With dead ends: 1154 [2022-01-18 05:05:52,388 INFO L226 Difference]: Without dead ends: 1082 [2022-01-18 05:05:52,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:52,389 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:52,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 98 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:05:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-01-18 05:05:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 959. [2022-01-18 05:05:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.3402922755741127) internal successors, (3200), 958 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3200 transitions. [2022-01-18 05:05:52,402 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3200 transitions. Word has length 21 [2022-01-18 05:05:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:52,402 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 3200 transitions. [2022-01-18 05:05:52,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3200 transitions. [2022-01-18 05:05:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:52,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:52,404 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:52,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:52,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:52,632 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2094524422, now seen corresponding path program 28 times [2022-01-18 05:05:52,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:52,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652601963] [2022-01-18 05:05:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:52,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:52,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:52,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652601963] [2022-01-18 05:05:52,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652601963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:52,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309339386] [2022-01-18 05:05:52,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:52,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:52,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:52,702 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) [2022-01-18 05:05:52,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 05:05:52,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:52,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:52,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:52,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 236 [2022-01-18 05:05:53,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-01-18 05:05:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:53,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:53,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 208 [2022-01-18 05:05:53,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:53,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 197 [2022-01-18 05:05:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:53,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309339386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:53,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:53,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:05:53,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532244186] [2022-01-18 05:05:53,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:53,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:05:53,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:05:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:53,738 INFO L87 Difference]: Start difference. First operand 959 states and 3200 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:53,979 INFO L93 Difference]: Finished difference Result 1373 states and 4390 transitions. [2022-01-18 05:05:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:53,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:53,981 INFO L225 Difference]: With dead ends: 1373 [2022-01-18 05:05:53,982 INFO L226 Difference]: Without dead ends: 1312 [2022-01-18 05:05:53,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:53,982 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 154 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:53,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 121 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:05:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-01-18 05:05:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 999. [2022-01-18 05:05:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.3927855711422845) internal successors, (3386), 998 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3386 transitions. [2022-01-18 05:05:53,996 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3386 transitions. Word has length 21 [2022-01-18 05:05:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 3386 transitions. [2022-01-18 05:05:53,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3386 transitions. [2022-01-18 05:05:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:53,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:53,998 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:54,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:54,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:54,199 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash -526483292, now seen corresponding path program 29 times [2022-01-18 05:05:54,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:54,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065983268] [2022-01-18 05:05:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:54,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:54,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:54,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065983268] [2022-01-18 05:05:54,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065983268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:54,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073496299] [2022-01-18 05:05:54,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:54,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:54,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:54,276 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) [2022-01-18 05:05:54,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 05:05:54,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:54,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:54,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 199 [2022-01-18 05:05:54,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-01-18 05:05:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:54,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:54,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-01-18 05:05:54,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-01-18 05:05:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:55,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073496299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:55,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:55,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:05:55,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54230865] [2022-01-18 05:05:55,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:55,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:05:55,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:55,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:05:55,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:55,125 INFO L87 Difference]: Start difference. First operand 999 states and 3386 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:55,258 INFO L93 Difference]: Finished difference Result 1242 states and 4031 transitions. [2022-01-18 05:05:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:05:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:55,260 INFO L225 Difference]: With dead ends: 1242 [2022-01-18 05:05:55,260 INFO L226 Difference]: Without dead ends: 1190 [2022-01-18 05:05:55,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:55,260 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:55,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 88 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:05:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-01-18 05:05:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 947. [2022-01-18 05:05:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.3520084566596196) internal successors, (3171), 946 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3171 transitions. [2022-01-18 05:05:55,272 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3171 transitions. Word has length 21 [2022-01-18 05:05:55,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:55,272 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 3171 transitions. [2022-01-18 05:05:55,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3171 transitions. [2022-01-18 05:05:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:55,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:55,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:55,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 05:05:55,476 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,SelfDestructingSolverStorable45 [2022-01-18 05:05:55,476 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:55,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1098970042, now seen corresponding path program 30 times [2022-01-18 05:05:55,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:55,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300625398] [2022-01-18 05:05:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:55,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:55,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:55,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300625398] [2022-01-18 05:05:55,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300625398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:55,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430987183] [2022-01-18 05:05:55,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:55,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:55,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:55,538 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) [2022-01-18 05:05:55,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 05:05:55,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:05:55,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:55,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:55,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 220 [2022-01-18 05:05:55,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 05:05:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:55,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:56,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:56,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-01-18 05:05:56,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-01-18 05:05:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430987183] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:56,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:56,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:05:56,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818525030] [2022-01-18 05:05:56,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:56,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:05:56,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:05:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:56,436 INFO L87 Difference]: Start difference. First operand 947 states and 3171 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 05:05:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:56,655 INFO L93 Difference]: Finished difference Result 1315 states and 4207 transitions. [2022-01-18 05:05:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:05:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:56,657 INFO L225 Difference]: With dead ends: 1315 [2022-01-18 05:05:56,657 INFO L226 Difference]: Without dead ends: 1224 [2022-01-18 05:05:56,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:56,657 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:56,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 90 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:05:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-01-18 05:05:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 959. [2022-01-18 05:05:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.324634655532359) internal successors, (3185), 958 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3185 transitions. [2022-01-18 05:05:56,672 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3185 transitions. Word has length 21 [2022-01-18 05:05:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:56,672 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 3185 transitions. [2022-01-18 05:05:56,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 05:05:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3185 transitions. [2022-01-18 05:05:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:56,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:56,674 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:56,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:56,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 05:05:56,890 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:56,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1054285416, now seen corresponding path program 31 times [2022-01-18 05:05:56,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:56,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282794841] [2022-01-18 05:05:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:56,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:56,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282794841] [2022-01-18 05:05:56,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282794841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842443964] [2022-01-18 05:05:56,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:56,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:56,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:56,963 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) [2022-01-18 05:05:56,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 05:05:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:57,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-01-18 05:05:57,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 05:05:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:57,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:57,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 322 [2022-01-18 05:05:57,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:57,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 295 [2022-01-18 05:05:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:58,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842443964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:58,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:58,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:05:58,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274071273] [2022-01-18 05:05:58,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:58,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:05:58,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:05:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:58,103 INFO L87 Difference]: Start difference. First operand 959 states and 3185 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 05:05:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:58,342 INFO L93 Difference]: Finished difference Result 1348 states and 4293 transitions. [2022-01-18 05:05:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:05:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:05:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:58,344 INFO L225 Difference]: With dead ends: 1348 [2022-01-18 05:05:58,344 INFO L226 Difference]: Without dead ends: 1276 [2022-01-18 05:05:58,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:58,345 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 157 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:05:58,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 132 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:05:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-01-18 05:05:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 979. [2022-01-18 05:05:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 3.3333333333333335) internal successors, (3260), 978 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:05:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3260 transitions. [2022-01-18 05:05:58,358 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3260 transitions. Word has length 21 [2022-01-18 05:05:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:58,359 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 3260 transitions. [2022-01-18 05:05:58,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 05:05:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3260 transitions. [2022-01-18 05:05:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:05:58,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:58,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:58,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 05:05:58,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:58,561 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -701145926, now seen corresponding path program 32 times [2022-01-18 05:05:58,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:58,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737298938] [2022-01-18 05:05:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:58,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:58,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737298938] [2022-01-18 05:05:58,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737298938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801686548] [2022-01-18 05:05:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:58,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:58,636 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) [2022-01-18 05:05:58,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 05:05:58,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:58,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:05:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:58,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 224 [2022-01-18 05:05:59,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 05:05:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:59,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:59,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 224 [2022-01-18 05:05:59,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:59,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 213 [2022-01-18 05:05:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:59,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801686548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:59,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:59,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:05:59,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140711864] [2022-01-18 05:05:59,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:59,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:05:59,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:05:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:59,688 INFO L87 Difference]: Start difference. First operand 979 states and 3260 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 05:06:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:00,068 INFO L93 Difference]: Finished difference Result 1531 states and 4858 transitions. [2022-01-18 05:06:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:00,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:00,071 INFO L225 Difference]: With dead ends: 1531 [2022-01-18 05:06:00,071 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 05:06:00,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:06:00,081 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:00,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 143 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 05:06:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1021. [2022-01-18 05:06:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.384313725490196) internal successors, (3452), 1020 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3452 transitions. [2022-01-18 05:06:00,097 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3452 transitions. Word has length 21 [2022-01-18 05:06:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:00,098 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 3452 transitions. [2022-01-18 05:06:00,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2022-01-18 05:06:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3452 transitions. [2022-01-18 05:06:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:00,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:00,099 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:00,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 05:06:00,300 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,SelfDestructingSolverStorable48 [2022-01-18 05:06:00,300 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash 972813656, now seen corresponding path program 33 times [2022-01-18 05:06:00,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642614897] [2022-01-18 05:06:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:00,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:00,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642614897] [2022-01-18 05:06:00,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642614897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15628220] [2022-01-18 05:06:00,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:00,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:00,382 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) [2022-01-18 05:06:00,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 05:06:00,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:06:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:00,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 147 [2022-01-18 05:06:00,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 187 [2022-01-18 05:06:00,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2022-01-18 05:06:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:01,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:01,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 203 [2022-01-18 05:06:01,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:01,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-01-18 05:06:01,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-01-18 05:06:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:01,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15628220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:01,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:01,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-18 05:06:01,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019692627] [2022-01-18 05:06:01,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:01,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:01,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:01,837 INFO L87 Difference]: Start difference. First operand 1021 states and 3452 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:02,859 INFO L93 Difference]: Finished difference Result 1875 states and 5735 transitions. [2022-01-18 05:06:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:06:02,859 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:02,862 INFO L225 Difference]: With dead ends: 1875 [2022-01-18 05:06:02,862 INFO L226 Difference]: Without dead ends: 1721 [2022-01-18 05:06:02,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:06:02,863 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 211 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:02,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 378 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:06:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-18 05:06:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 920. [2022-01-18 05:06:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.323177366702938) internal successors, (3054), 919 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3054 transitions. [2022-01-18 05:06:02,880 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3054 transitions. Word has length 21 [2022-01-18 05:06:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:02,880 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 3054 transitions. [2022-01-18 05:06:02,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3054 transitions. [2022-01-18 05:06:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:02,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:02,882 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:02,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 05:06:03,082 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,SelfDestructingSolverStorable49 [2022-01-18 05:06:03,082 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash -29373002, now seen corresponding path program 34 times [2022-01-18 05:06:03,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:03,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350229262] [2022-01-18 05:06:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:03,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:03,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350229262] [2022-01-18 05:06:03,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350229262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546074675] [2022-01-18 05:06:03,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:03,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:03,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:03,144 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) [2022-01-18 05:06:03,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 05:06:03,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:03,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:03,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:03,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:03,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 05:06:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:03,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:03,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-01-18 05:06:03,661 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:06:03,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:06:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:03,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546074675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:03,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:03,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 05:06:03,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514878445] [2022-01-18 05:06:03,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:03,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:06:03,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:03,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:06:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:06:03,668 INFO L87 Difference]: Start difference. First operand 920 states and 3054 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:03,860 INFO L93 Difference]: Finished difference Result 1245 states and 4036 transitions. [2022-01-18 05:06:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:03,862 INFO L225 Difference]: With dead ends: 1245 [2022-01-18 05:06:03,862 INFO L226 Difference]: Without dead ends: 1169 [2022-01-18 05:06:03,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:06:03,862 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:03,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 118 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-18 05:06:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 922. [2022-01-18 05:06:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3224755700325734) internal successors, (3060), 921 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3060 transitions. [2022-01-18 05:06:03,879 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3060 transitions. Word has length 21 [2022-01-18 05:06:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:03,879 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 3060 transitions. [2022-01-18 05:06:03,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3060 transitions. [2022-01-18 05:06:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:03,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:03,881 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:03,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:04,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:04,095 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2108758372, now seen corresponding path program 35 times [2022-01-18 05:06:04,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963156870] [2022-01-18 05:06:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:04,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:04,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963156870] [2022-01-18 05:06:04,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963156870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991861308] [2022-01-18 05:06:04,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:04,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:04,162 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) [2022-01-18 05:06:04,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 05:06:04,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:04,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:04,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:04,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:04,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-01-18 05:06:04,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 137 [2022-01-18 05:06:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:04,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:04,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-01-18 05:06:04,895 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:06:04,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:06:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:04,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991861308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:04,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:04,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:06:04,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947002485] [2022-01-18 05:06:04,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:04,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:06:04,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:04,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:06:04,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:06:04,902 INFO L87 Difference]: Start difference. First operand 922 states and 3060 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:05,115 INFO L93 Difference]: Finished difference Result 1452 states and 4693 transitions. [2022-01-18 05:06:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:05,117 INFO L225 Difference]: With dead ends: 1452 [2022-01-18 05:06:05,118 INFO L226 Difference]: Without dead ends: 1396 [2022-01-18 05:06:05,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:05,118 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:05,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 113 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-01-18 05:06:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 992. [2022-01-18 05:06:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.400605449041372) internal successors, (3370), 991 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3370 transitions. [2022-01-18 05:06:05,132 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3370 transitions. Word has length 21 [2022-01-18 05:06:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:05,132 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 3370 transitions. [2022-01-18 05:06:05,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3370 transitions. [2022-01-18 05:06:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:05,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:05,134 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:05,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:05,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:05,334 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash 453752306, now seen corresponding path program 36 times [2022-01-18 05:06:05,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:05,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274598013] [2022-01-18 05:06:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:05,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:05,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274598013] [2022-01-18 05:06:05,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274598013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54903282] [2022-01-18 05:06:05,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:05,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:05,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:05,396 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) [2022-01-18 05:06:05,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 05:06:05,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:06:05,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:05,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:05,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-01-18 05:06:05,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 137 [2022-01-18 05:06:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:05,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:06,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 290 [2022-01-18 05:06:06,245 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:06:06,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:06:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:06,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54903282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:06,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:06,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:06:06,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872465816] [2022-01-18 05:06:06,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:06,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:06:06,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:06:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:06:06,252 INFO L87 Difference]: Start difference. First operand 992 states and 3370 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:06,480 INFO L93 Difference]: Finished difference Result 1351 states and 4368 transitions. [2022-01-18 05:06:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:06,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:06,482 INFO L225 Difference]: With dead ends: 1351 [2022-01-18 05:06:06,482 INFO L226 Difference]: Without dead ends: 1290 [2022-01-18 05:06:06,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:06,482 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:06,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 104 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-01-18 05:06:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 967. [2022-01-18 05:06:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.36231884057971) internal successors, (3248), 966 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3248 transitions. [2022-01-18 05:06:06,495 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3248 transitions. Word has length 21 [2022-01-18 05:06:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:06,495 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 3248 transitions. [2022-01-18 05:06:06,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3248 transitions. [2022-01-18 05:06:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:06,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:06,497 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:06,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:06,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:06,698 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:06,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1576434822, now seen corresponding path program 37 times [2022-01-18 05:06:06,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:06,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110342599] [2022-01-18 05:06:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:06,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:06,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110342599] [2022-01-18 05:06:06,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110342599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265444944] [2022-01-18 05:06:06,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:06,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:06,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:06,757 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) [2022-01-18 05:06:06,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 05:06:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:06,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 05:06:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:06,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:07,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 328 treesize of output 284 [2022-01-18 05:06:07,431 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:06:07,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:06:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:07,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265444944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:07,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:07,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:06:07,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630256629] [2022-01-18 05:06:07,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:07,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:06:07,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:07,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:06:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:06:07,438 INFO L87 Difference]: Start difference. First operand 967 states and 3248 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:07,654 INFO L93 Difference]: Finished difference Result 1248 states and 4051 transitions. [2022-01-18 05:06:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:07,656 INFO L225 Difference]: With dead ends: 1248 [2022-01-18 05:06:07,656 INFO L226 Difference]: Without dead ends: 1190 [2022-01-18 05:06:07,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:07,657 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:07,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 143 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-01-18 05:06:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 928. [2022-01-18 05:06:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.335490830636462) internal successors, (3092), 927 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3092 transitions. [2022-01-18 05:06:07,668 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3092 transitions. Word has length 21 [2022-01-18 05:06:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:07,668 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 3092 transitions. [2022-01-18 05:06:07,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3092 transitions. [2022-01-18 05:06:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:07,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:07,670 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:07,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 05:06:07,870 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,SelfDestructingSolverStorable53 [2022-01-18 05:06:07,870 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash 954086356, now seen corresponding path program 38 times [2022-01-18 05:06:07,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791167964] [2022-01-18 05:06:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:07,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:07,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791167964] [2022-01-18 05:06:07,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791167964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:07,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662442980] [2022-01-18 05:06:07,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:07,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:07,945 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) [2022-01-18 05:06:07,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 05:06:08,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:08,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-01-18 05:06:08,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-01-18 05:06:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:08,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:08,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 210 [2022-01-18 05:06:08,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:08,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 199 [2022-01-18 05:06:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:08,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662442980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:08,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:08,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:06:08,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916060063] [2022-01-18 05:06:08,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:08,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:08,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:08,811 INFO L87 Difference]: Start difference. First operand 928 states and 3092 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2022-01-18 05:06:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:08,984 INFO L93 Difference]: Finished difference Result 1313 states and 4240 transitions. [2022-01-18 05:06:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:08,986 INFO L225 Difference]: With dead ends: 1313 [2022-01-18 05:06:08,986 INFO L226 Difference]: Without dead ends: 1257 [2022-01-18 05:06:08,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:08,987 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:08,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 104 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-01-18 05:06:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 964. [2022-01-18 05:06:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.3883696780893042) internal successors, (3263), 963 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3263 transitions. [2022-01-18 05:06:09,001 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3263 transitions. Word has length 21 [2022-01-18 05:06:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:09,002 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 3263 transitions. [2022-01-18 05:06:09,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2022-01-18 05:06:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3263 transitions. [2022-01-18 05:06:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:09,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:09,003 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:09,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 05:06:09,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 05:06:09,204 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash -700919710, now seen corresponding path program 39 times [2022-01-18 05:06:09,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884616346] [2022-01-18 05:06:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:09,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:09,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884616346] [2022-01-18 05:06:09,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884616346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344016727] [2022-01-18 05:06:09,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:09,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:09,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:09,275 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) [2022-01-18 05:06:09,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 05:06:09,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:09,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-01-18 05:06:09,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-01-18 05:06:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:09,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:09,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-01-18 05:06:09,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:09,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 180 [2022-01-18 05:06:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:10,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344016727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:10,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:10,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:06:10,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648015173] [2022-01-18 05:06:10,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:10,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:10,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:10,103 INFO L87 Difference]: Start difference. First operand 964 states and 3263 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2022-01-18 05:06:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:10,337 INFO L93 Difference]: Finished difference Result 1407 states and 4471 transitions. [2022-01-18 05:06:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:10,339 INFO L225 Difference]: With dead ends: 1407 [2022-01-18 05:06:10,339 INFO L226 Difference]: Without dead ends: 1346 [2022-01-18 05:06:10,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:10,340 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:10,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 161 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-01-18 05:06:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 932. [2022-01-18 05:06:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.3372717508055856) internal successors, (3107), 931 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3107 transitions. [2022-01-18 05:06:10,357 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3107 transitions. Word has length 21 [2022-01-18 05:06:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:10,358 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 3107 transitions. [2022-01-18 05:06:10,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2022-01-18 05:06:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3107 transitions. [2022-01-18 05:06:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:10,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:10,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:10,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:10,579 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,SelfDestructingSolverStorable55 [2022-01-18 05:06:10,579 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash -102830666, now seen corresponding path program 40 times [2022-01-18 05:06:10,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988222517] [2022-01-18 05:06:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:10,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:10,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:10,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988222517] [2022-01-18 05:06:10,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988222517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:10,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473279037] [2022-01-18 05:06:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:10,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:10,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:10,643 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) [2022-01-18 05:06:10,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 05:06:10,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:10,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:10,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 243 [2022-01-18 05:06:11,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 05:06:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:11,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:11,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 224 [2022-01-18 05:06:11,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:11,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 213 [2022-01-18 05:06:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:11,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473279037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:11,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:11,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:06:11,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769527510] [2022-01-18 05:06:11,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:11,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:06:11,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:06:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:06:11,743 INFO L87 Difference]: Start difference. First operand 932 states and 3107 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:11,938 INFO L93 Difference]: Finished difference Result 1201 states and 3843 transitions. [2022-01-18 05:06:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:11,941 INFO L225 Difference]: With dead ends: 1201 [2022-01-18 05:06:11,941 INFO L226 Difference]: Without dead ends: 1129 [2022-01-18 05:06:11,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:11,941 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:11,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 133 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-01-18 05:06:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 894. [2022-01-18 05:06:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.3292273236282193) internal successors, (2973), 893 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2973 transitions. [2022-01-18 05:06:11,953 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2973 transitions. Word has length 21 [2022-01-18 05:06:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:11,953 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 2973 transitions. [2022-01-18 05:06:11,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2973 transitions. [2022-01-18 05:06:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:11,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:11,955 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:11,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 05:06:12,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 05:06:12,155 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1032203744, now seen corresponding path program 41 times [2022-01-18 05:06:12,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:12,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286769731] [2022-01-18 05:06:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:12,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:12,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286769731] [2022-01-18 05:06:12,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286769731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711331504] [2022-01-18 05:06:12,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:12,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:12,224 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) [2022-01-18 05:06:12,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 05:06:12,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:12,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:12,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:12,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-01-18 05:06:12,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:06:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:12,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:12,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-01-18 05:06:12,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:12,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:06:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711331504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:12,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:12,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:06:12,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536238553] [2022-01-18 05:06:12,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:12,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:06:12,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:06:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:06:12,930 INFO L87 Difference]: Start difference. First operand 894 states and 2973 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:13,150 INFO L93 Difference]: Finished difference Result 1220 states and 3917 transitions. [2022-01-18 05:06:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:13,152 INFO L225 Difference]: With dead ends: 1220 [2022-01-18 05:06:13,152 INFO L226 Difference]: Without dead ends: 1159 [2022-01-18 05:06:13,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:13,153 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:13,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 116 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-18 05:06:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 904. [2022-01-18 05:06:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.338870431893688) internal successors, (3015), 903 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3015 transitions. [2022-01-18 05:06:13,165 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3015 transitions. Word has length 21 [2022-01-18 05:06:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:13,166 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 3015 transitions. [2022-01-18 05:06:13,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3015 transitions. [2022-01-18 05:06:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:13,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:13,167 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:13,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 05:06:13,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:13,367 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1588803970, now seen corresponding path program 42 times [2022-01-18 05:06:13,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231648807] [2022-01-18 05:06:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:13,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:13,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:13,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231648807] [2022-01-18 05:06:13,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231648807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:13,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376252030] [2022-01-18 05:06:13,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:13,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:13,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:13,453 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) [2022-01-18 05:06:13,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 05:06:13,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:13,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:13,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:13,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:13,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-01-18 05:06:13,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 137 [2022-01-18 05:06:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:13,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:13,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-01-18 05:06:14,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:14,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 05:06:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:14,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376252030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:14,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:14,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:06:14,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807632495] [2022-01-18 05:06:14,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:14,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:14,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:14,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:14,183 INFO L87 Difference]: Start difference. First operand 904 states and 3015 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:14,351 INFO L93 Difference]: Finished difference Result 1209 states and 3853 transitions. [2022-01-18 05:06:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:14,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:14,353 INFO L225 Difference]: With dead ends: 1209 [2022-01-18 05:06:14,353 INFO L226 Difference]: Without dead ends: 1157 [2022-01-18 05:06:14,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:14,354 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 135 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:14,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 83 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-18 05:06:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 871. [2022-01-18 05:06:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2896551724137932) internal successors, (2862), 870 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2862 transitions. [2022-01-18 05:06:14,371 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2862 transitions. Word has length 21 [2022-01-18 05:06:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:14,371 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 2862 transitions. [2022-01-18 05:06:14,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2862 transitions. [2022-01-18 05:06:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:14,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:14,373 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:14,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:14,587 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,SelfDestructingSolverStorable58 [2022-01-18 05:06:14,587 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:14,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash -548568172, now seen corresponding path program 43 times [2022-01-18 05:06:14,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:14,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475416296] [2022-01-18 05:06:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:14,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:14,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:14,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475416296] [2022-01-18 05:06:14,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475416296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:14,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520812727] [2022-01-18 05:06:14,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:14,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:14,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:14,658 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) [2022-01-18 05:06:14,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 05:06:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:14,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:06:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:14,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 05:06:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:14,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:14,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 212 [2022-01-18 05:06:15,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:15,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 05:06:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:15,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520812727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:15,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:15,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:06:15,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199208308] [2022-01-18 05:06:15,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:15,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:15,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:15,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:15,273 INFO L87 Difference]: Start difference. First operand 871 states and 2862 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:15,445 INFO L93 Difference]: Finished difference Result 1063 states and 3402 transitions. [2022-01-18 05:06:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:15,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:15,447 INFO L225 Difference]: With dead ends: 1063 [2022-01-18 05:06:15,447 INFO L226 Difference]: Without dead ends: 1005 [2022-01-18 05:06:15,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:15,448 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:15,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 121 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-18 05:06:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 775. [2022-01-18 05:06:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.2700258397932815) internal successors, (2531), 774 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2531 transitions. [2022-01-18 05:06:15,457 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2531 transitions. Word has length 21 [2022-01-18 05:06:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:15,458 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2531 transitions. [2022-01-18 05:06:15,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2531 transitions. [2022-01-18 05:06:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:15,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:15,459 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:15,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 05:06:15,659 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,SelfDestructingSolverStorable59 [2022-01-18 05:06:15,659 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash 216306962, now seen corresponding path program 44 times [2022-01-18 05:06:15,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:15,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387215208] [2022-01-18 05:06:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:15,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:15,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:15,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387215208] [2022-01-18 05:06:15,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387215208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:15,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780912578] [2022-01-18 05:06:15,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:15,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:15,764 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) [2022-01-18 05:06:15,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 05:06:15,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:15,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:15,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:15,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:15,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:15,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:06:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:15,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:16,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-01-18 05:06:16,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:16,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 05:06:16,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:16,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780912578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:16,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:16,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 05:06:16,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194089135] [2022-01-18 05:06:16,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:16,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:16,399 INFO L87 Difference]: Start difference. First operand 775 states and 2531 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:16,629 INFO L93 Difference]: Finished difference Result 973 states and 3109 transitions. [2022-01-18 05:06:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:06:16,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:16,632 INFO L225 Difference]: With dead ends: 973 [2022-01-18 05:06:16,632 INFO L226 Difference]: Without dead ends: 906 [2022-01-18 05:06:16,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:16,632 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:16,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 136 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-01-18 05:06:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 763. [2022-01-18 05:06:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.263779527559055) internal successors, (2487), 762 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2487 transitions. [2022-01-18 05:06:16,644 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2487 transitions. Word has length 21 [2022-01-18 05:06:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:16,644 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2487 transitions. [2022-01-18 05:06:16,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2487 transitions. [2022-01-18 05:06:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:16,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:16,645 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:16,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:16,846 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,SelfDestructingSolverStorable60 [2022-01-18 05:06:16,846 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:16,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1391797606, now seen corresponding path program 45 times [2022-01-18 05:06:16,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:16,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755065543] [2022-01-18 05:06:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:16,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:16,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:16,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755065543] [2022-01-18 05:06:16,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755065543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:16,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273251205] [2022-01-18 05:06:16,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:16,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:16,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:16,928 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) [2022-01-18 05:06:16,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 05:06:16,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:06:16,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:17,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:17,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:06:17,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 117 [2022-01-18 05:06:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:17,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:17,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-01-18 05:06:17,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:17,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 05:06:17,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:17,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273251205] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:17,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:17,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-01-18 05:06:17,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112846096] [2022-01-18 05:06:17,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:17,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:06:17,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:06:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:06:17,768 INFO L87 Difference]: Start difference. First operand 763 states and 2487 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:17,948 INFO L93 Difference]: Finished difference Result 1036 states and 3248 transitions. [2022-01-18 05:06:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:06:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:17,950 INFO L225 Difference]: With dead ends: 1036 [2022-01-18 05:06:17,950 INFO L226 Difference]: Without dead ends: 982 [2022-01-18 05:06:17,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:17,951 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:17,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 95 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-01-18 05:06:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 755. [2022-01-18 05:06:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.2480106100795756) internal successors, (2449), 754 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2449 transitions. [2022-01-18 05:06:17,960 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2449 transitions. Word has length 21 [2022-01-18 05:06:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:17,960 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2449 transitions. [2022-01-18 05:06:17,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2449 transitions. [2022-01-18 05:06:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:17,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:17,961 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:17,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:18,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:18,162 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:18,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1289602956, now seen corresponding path program 46 times [2022-01-18 05:06:18,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:18,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525655015] [2022-01-18 05:06:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:18,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:18,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525655015] [2022-01-18 05:06:18,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525655015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779446293] [2022-01-18 05:06:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:18,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:18,247 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) [2022-01-18 05:06:18,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 05:06:18,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:18,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:18,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:18,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:06:18,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 131 [2022-01-18 05:06:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:18,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:18,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-01-18 05:06:19,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:19,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 05:06:19,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:19,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779446293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:19,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:19,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 05:06:19,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517349491] [2022-01-18 05:06:19,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:19,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:19,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:19,323 INFO L87 Difference]: Start difference. First operand 755 states and 2449 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:19,509 INFO L93 Difference]: Finished difference Result 963 states and 3011 transitions. [2022-01-18 05:06:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:19,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:19,511 INFO L225 Difference]: With dead ends: 963 [2022-01-18 05:06:19,511 INFO L226 Difference]: Without dead ends: 906 [2022-01-18 05:06:19,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:19,511 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:19,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 111 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-01-18 05:06:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 722. [2022-01-18 05:06:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.1941747572815533) internal successors, (2303), 721 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2303 transitions. [2022-01-18 05:06:19,523 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2303 transitions. Word has length 21 [2022-01-18 05:06:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:19,523 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 2303 transitions. [2022-01-18 05:06:19,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2303 transitions. [2022-01-18 05:06:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:19,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:19,524 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:19,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 05:06:19,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:19,742 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:19,742 INFO L85 PathProgramCache]: Analyzing trace with hash -822698094, now seen corresponding path program 47 times [2022-01-18 05:06:19,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:19,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790224458] [2022-01-18 05:06:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:19,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:19,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:19,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790224458] [2022-01-18 05:06:19,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790224458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786487699] [2022-01-18 05:06:19,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:19,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:19,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:19,848 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) [2022-01-18 05:06:19,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 05:06:19,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:19,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:20,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:06:20,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:20,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:20,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:06:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:20,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:20,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:20,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:06:20,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:20,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 157 [2022-01-18 05:06:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:20,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786487699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:20,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:20,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-01-18 05:06:20,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683359592] [2022-01-18 05:06:20,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:20,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:06:20,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:06:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:20,675 INFO L87 Difference]: Start difference. First operand 722 states and 2303 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:20,907 INFO L93 Difference]: Finished difference Result 1016 states and 3105 transitions. [2022-01-18 05:06:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:06:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:20,909 INFO L225 Difference]: With dead ends: 1016 [2022-01-18 05:06:20,909 INFO L226 Difference]: Without dead ends: 964 [2022-01-18 05:06:20,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:06:20,910 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 108 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:20,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 98 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-01-18 05:06:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 732. [2022-01-18 05:06:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.1997264021887823) internal successors, (2339), 731 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2339 transitions. [2022-01-18 05:06:20,923 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2339 transitions. Word has length 21 [2022-01-18 05:06:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:20,923 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2339 transitions. [2022-01-18 05:06:20,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2339 transitions. [2022-01-18 05:06:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:20,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:20,925 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:20,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:21,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:21,155 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 790868640, now seen corresponding path program 48 times [2022-01-18 05:06:21,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:21,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795390976] [2022-01-18 05:06:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:21,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:21,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795390976] [2022-01-18 05:06:21,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795390976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:21,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554560667] [2022-01-18 05:06:21,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:21,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:21,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:21,234 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) [2022-01-18 05:06:21,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 05:06:21,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:06:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:21,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:21,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:06:21,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:06:21,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:21,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:21,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:21,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:21,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-01-18 05:06:21,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-01-18 05:06:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554560667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:22,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:22,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 05:06:22,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079727700] [2022-01-18 05:06:22,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:22,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:22,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:22,050 INFO L87 Difference]: Start difference. First operand 732 states and 2339 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:22,319 INFO L93 Difference]: Finished difference Result 1080 states and 3233 transitions. [2022-01-18 05:06:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:06:22,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:22,320 INFO L225 Difference]: With dead ends: 1080 [2022-01-18 05:06:22,320 INFO L226 Difference]: Without dead ends: 1017 [2022-01-18 05:06:22,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:22,321 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:22,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-18 05:06:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 711. [2022-01-18 05:06:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.1577464788732392) internal successors, (2242), 710 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2242 transitions. [2022-01-18 05:06:22,329 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2242 transitions. Word has length 21 [2022-01-18 05:06:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:22,330 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2242 transitions. [2022-01-18 05:06:22,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2242 transitions. [2022-01-18 05:06:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:22,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:22,331 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:22,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:22,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 05:06:22,531 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash -728170158, now seen corresponding path program 49 times [2022-01-18 05:06:22,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:22,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098377412] [2022-01-18 05:06:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:22,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:22,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:22,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098377412] [2022-01-18 05:06:22,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098377412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:22,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53401669] [2022-01-18 05:06:22,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:22,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:22,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:22,637 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) [2022-01-18 05:06:22,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 05:06:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:22,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:22,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 253 [2022-01-18 05:06:23,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:23,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:23,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-18 05:06:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:23,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:23,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:23,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:23,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 255 treesize of output 233 [2022-01-18 05:06:23,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 204 [2022-01-18 05:06:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:23,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53401669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:23,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:23,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 05:06:23,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136511183] [2022-01-18 05:06:23,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:23,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:23,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:23,819 INFO L87 Difference]: Start difference. First operand 711 states and 2242 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:24,629 INFO L93 Difference]: Finished difference Result 1000 states and 3005 transitions. [2022-01-18 05:06:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:06:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:24,631 INFO L225 Difference]: With dead ends: 1000 [2022-01-18 05:06:24,631 INFO L226 Difference]: Without dead ends: 877 [2022-01-18 05:06:24,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:06:24,631 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:24,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 264 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:06:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-18 05:06:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 683. [2022-01-18 05:06:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.1524926686217007) internal successors, (2150), 682 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2150 transitions. [2022-01-18 05:06:24,642 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2150 transitions. Word has length 21 [2022-01-18 05:06:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:24,643 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2150 transitions. [2022-01-18 05:06:24,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2150 transitions. [2022-01-18 05:06:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:24,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:24,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:24,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:24,859 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,SelfDestructingSolverStorable65 [2022-01-18 05:06:24,859 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -877934359, now seen corresponding path program 50 times [2022-01-18 05:06:24,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:24,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976814357] [2022-01-18 05:06:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:24,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:25,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976814357] [2022-01-18 05:06:25,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976814357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740883861] [2022-01-18 05:06:25,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:25,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:25,021 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) [2022-01-18 05:06:25,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 05:06:25,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:25,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:25,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:25,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 196 [2022-01-18 05:06:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:25,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 182 [2022-01-18 05:06:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:25,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 286 [2022-01-18 05:06:25,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:25,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 05:06:26,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:26,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740883861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:26,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:26,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 05:06:26,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559238854] [2022-01-18 05:06:26,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:26,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:26,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:26,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:26,051 INFO L87 Difference]: Start difference. First operand 683 states and 2150 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2022-01-18 05:06:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:26,459 INFO L93 Difference]: Finished difference Result 964 states and 2978 transitions. [2022-01-18 05:06:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:06:26,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:26,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:26,461 INFO L225 Difference]: With dead ends: 964 [2022-01-18 05:06:26,461 INFO L226 Difference]: Without dead ends: 867 [2022-01-18 05:06:26,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:06:26,461 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:26,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 123 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-18 05:06:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 724. [2022-01-18 05:06:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 3.1673582295988933) internal successors, (2290), 723 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) [2022-01-18 05:06:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2290 transitions. [2022-01-18 05:06:26,470 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2290 transitions. Word has length 21 [2022-01-18 05:06:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:26,470 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 2290 transitions. [2022-01-18 05:06:26,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2022-01-18 05:06:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2290 transitions. [2022-01-18 05:06:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:26,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:26,471 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:26,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 05:06:26,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 05:06:26,671 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash -642670283, now seen corresponding path program 51 times [2022-01-18 05:06:26,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:26,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43872987] [2022-01-18 05:06:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:26,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:26,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:26,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43872987] [2022-01-18 05:06:26,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43872987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:26,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384807399] [2022-01-18 05:06:26,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:26,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:26,844 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) [2022-01-18 05:06:26,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 05:06:26,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:26,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:26,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:26,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:27,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:06:27,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:27,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 147 [2022-01-18 05:06:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:27,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:27,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 173 [2022-01-18 05:06:27,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:27,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 05:06:27,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:27,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384807399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:27,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:27,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 05:06:27,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217631581] [2022-01-18 05:06:27,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:27,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:27,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:27,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:27,838 INFO L87 Difference]: Start difference. First operand 724 states and 2290 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2022-01-18 05:06:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:28,453 INFO L93 Difference]: Finished difference Result 1087 states and 3349 transitions. [2022-01-18 05:06:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:06:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:28,455 INFO L225 Difference]: With dead ends: 1087 [2022-01-18 05:06:28,455 INFO L226 Difference]: Without dead ends: 967 [2022-01-18 05:06:28,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:06:28,455 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:28,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 155 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:06:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-18 05:06:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 723. [2022-01-18 05:06:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.170360110803324) internal successors, (2289), 722 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2289 transitions. [2022-01-18 05:06:28,464 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2289 transitions. Word has length 21 [2022-01-18 05:06:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:28,464 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2289 transitions. [2022-01-18 05:06:28,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2022-01-18 05:06:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2289 transitions. [2022-01-18 05:06:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:28,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:28,466 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:28,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 05:06:28,666 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,SelfDestructingSolverStorable67 [2022-01-18 05:06:28,666 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 882266749, now seen corresponding path program 52 times [2022-01-18 05:06:28,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:28,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065536544] [2022-01-18 05:06:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:28,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:06:28,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065536544] [2022-01-18 05:06:28,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065536544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202901034] [2022-01-18 05:06:28,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:28,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:28,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:28,776 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) [2022-01-18 05:06:28,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 05:06:28,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:28,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:29,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:06:29,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:29,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-18 05:06:29,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:29,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:29,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:29,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:29,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-01-18 05:06:29,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-01-18 05:06:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202901034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:29,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:29,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:06:29,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968943093] [2022-01-18 05:06:29,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:29,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:29,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:29,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:29,823 INFO L87 Difference]: Start difference. First operand 723 states and 2289 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-01-18 05:06:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:30,642 INFO L93 Difference]: Finished difference Result 1289 states and 3843 transitions. [2022-01-18 05:06:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:06:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 21 [2022-01-18 05:06:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:30,644 INFO L225 Difference]: With dead ends: 1289 [2022-01-18 05:06:30,644 INFO L226 Difference]: Without dead ends: 1140 [2022-01-18 05:06:30,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:06:30,644 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:30,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 202 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 582 Invalid, 0 Unknown, 255 Unchecked, 0.3s Time] [2022-01-18 05:06:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-18 05:06:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 732. [2022-01-18 05:06:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.176470588235294) internal successors, (2322), 731 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2322 transitions. [2022-01-18 05:06:30,657 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2322 transitions. Word has length 21 [2022-01-18 05:06:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:30,658 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2322 transitions. [2022-01-18 05:06:30,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-01-18 05:06:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2322 transitions. [2022-01-18 05:06:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:30,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:30,659 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:30,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 05:06:30,871 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,SelfDestructingSolverStorable68 [2022-01-18 05:06:30,871 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -498938725, now seen corresponding path program 53 times [2022-01-18 05:06:30,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:30,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444026373] [2022-01-18 05:06:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:30,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:30,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444026373] [2022-01-18 05:06:30,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444026373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207462145] [2022-01-18 05:06:30,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:30,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:30,986 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) [2022-01-18 05:06:30,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 05:06:31,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:31,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:31,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:31,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-01-18 05:06:31,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:31,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:06:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:31,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:31,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:31,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-01-18 05:06:31,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:31,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 194 [2022-01-18 05:06:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:31,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207462145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:31,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:31,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-18 05:06:31,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021776547] [2022-01-18 05:06:31,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:31,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:31,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:31,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:31,894 INFO L87 Difference]: Start difference. First operand 732 states and 2322 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:32,451 INFO L93 Difference]: Finished difference Result 1121 states and 3357 transitions. [2022-01-18 05:06:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:06:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:32,453 INFO L225 Difference]: With dead ends: 1121 [2022-01-18 05:06:32,453 INFO L226 Difference]: Without dead ends: 985 [2022-01-18 05:06:32,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:06:32,453 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:32,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 191 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:06:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-18 05:06:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 706. [2022-01-18 05:06:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1872340425531913) internal successors, (2247), 705 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2247 transitions. [2022-01-18 05:06:32,462 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2247 transitions. Word has length 21 [2022-01-18 05:06:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:32,462 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2247 transitions. [2022-01-18 05:06:32,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2247 transitions. [2022-01-18 05:06:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:32,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:32,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:32,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 05:06:32,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 05:06:32,670 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash 921136774, now seen corresponding path program 54 times [2022-01-18 05:06:32,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:32,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97352495] [2022-01-18 05:06:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:32,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:32,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:32,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97352495] [2022-01-18 05:06:32,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97352495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:32,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277928996] [2022-01-18 05:06:32,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:32,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:32,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:32,739 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) [2022-01-18 05:06:32,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 05:06:32,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:32,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:32,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:32,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:06:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:32,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:33,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-01-18 05:06:33,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:33,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 05:06:33,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:33,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277928996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:33,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:33,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:06:33,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527528761] [2022-01-18 05:06:33,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:06:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:06:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:06:33,523 INFO L87 Difference]: Start difference. First operand 706 states and 2247 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:33,671 INFO L93 Difference]: Finished difference Result 835 states and 2620 transitions. [2022-01-18 05:06:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:06:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:33,673 INFO L225 Difference]: With dead ends: 835 [2022-01-18 05:06:33,673 INFO L226 Difference]: Without dead ends: 772 [2022-01-18 05:06:33,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:33,673 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:33,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 107 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-18 05:06:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 679. [2022-01-18 05:06:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.1976401179941) internal successors, (2168), 678 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2168 transitions. [2022-01-18 05:06:33,680 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2168 transitions. Word has length 21 [2022-01-18 05:06:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:33,680 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2168 transitions. [2022-01-18 05:06:33,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2168 transitions. [2022-01-18 05:06:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:33,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:33,681 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:33,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 05:06:33,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:33,882 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -163255560, now seen corresponding path program 55 times [2022-01-18 05:06:33,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:33,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087318404] [2022-01-18 05:06:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:33,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:33,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087318404] [2022-01-18 05:06:33,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087318404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81545739] [2022-01-18 05:06:33,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:33,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:33,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:33,963 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) [2022-01-18 05:06:33,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 05:06:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:34,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:34,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:34,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:34,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:06:34,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 131 [2022-01-18 05:06:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:34,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:06:34,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:34,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 05:06:34,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:34,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81545739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:34,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:34,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:06:34,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587463285] [2022-01-18 05:06:34,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:34,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:34,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:34,926 INFO L87 Difference]: Start difference. First operand 679 states and 2168 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:35,057 INFO L93 Difference]: Finished difference Result 962 states and 2972 transitions. [2022-01-18 05:06:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:06:35,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:35,058 INFO L225 Difference]: With dead ends: 962 [2022-01-18 05:06:35,058 INFO L226 Difference]: Without dead ends: 898 [2022-01-18 05:06:35,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:06:35,058 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:35,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 95 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-01-18 05:06:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 679. [2022-01-18 05:06:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.1946902654867255) internal successors, (2166), 678 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2166 transitions. [2022-01-18 05:06:35,069 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2166 transitions. Word has length 21 [2022-01-18 05:06:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:35,069 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2166 transitions. [2022-01-18 05:06:35,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2166 transitions. [2022-01-18 05:06:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:35,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:35,070 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:35,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:35,271 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1917216036, now seen corresponding path program 56 times [2022-01-18 05:06:35,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053141016] [2022-01-18 05:06:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:35,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:35,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:35,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053141016] [2022-01-18 05:06:35,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053141016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:35,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394627111] [2022-01-18 05:06:35,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:35,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:35,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:35,343 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) [2022-01-18 05:06:35,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 05:06:35,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:35,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:35,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:35,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:35,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-01-18 05:06:35,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:06:35,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:35,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:35,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:35,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:06:35,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:35,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 141 [2022-01-18 05:06:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:36,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394627111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:36,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:36,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:06:36,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452949931] [2022-01-18 05:06:36,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:36,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:36,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:36,260 INFO L87 Difference]: Start difference. First operand 679 states and 2166 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:36,393 INFO L93 Difference]: Finished difference Result 925 states and 2831 transitions. [2022-01-18 05:06:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:06:36,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:36,394 INFO L225 Difference]: With dead ends: 925 [2022-01-18 05:06:36,395 INFO L226 Difference]: Without dead ends: 859 [2022-01-18 05:06:36,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:06:36,395 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 143 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:36,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 80 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-18 05:06:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 634. [2022-01-18 05:06:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 3.1248025276461298) internal successors, (1978), 633 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1978 transitions. [2022-01-18 05:06:36,403 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1978 transitions. Word has length 21 [2022-01-18 05:06:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:36,403 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1978 transitions. [2022-01-18 05:06:36,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1978 transitions. [2022-01-18 05:06:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:36,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:36,404 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:36,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 05:06:36,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:36,604 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash -590424302, now seen corresponding path program 57 times [2022-01-18 05:06:36,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152807337] [2022-01-18 05:06:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:36,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:36,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152807337] [2022-01-18 05:06:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152807337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127883401] [2022-01-18 05:06:36,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:36,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:36,819 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) [2022-01-18 05:06:36,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 05:06:36,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:06:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:37,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:06:37,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:37,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:06:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:37,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:37,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:37,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:06:37,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:37,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 141 [2022-01-18 05:06:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:37,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127883401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:37,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:37,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-01-18 05:06:37,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631420522] [2022-01-18 05:06:37,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:37,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:37,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:37,810 INFO L87 Difference]: Start difference. First operand 634 states and 1978 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:38,850 INFO L93 Difference]: Finished difference Result 1108 states and 3182 transitions. [2022-01-18 05:06:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:06:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:38,852 INFO L225 Difference]: With dead ends: 1108 [2022-01-18 05:06:38,852 INFO L226 Difference]: Without dead ends: 945 [2022-01-18 05:06:38,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:06:38,852 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 218 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:38,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 270 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:06:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-01-18 05:06:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 638. [2022-01-18 05:06:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 3.1020408163265305) internal successors, (1976), 637 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1976 transitions. [2022-01-18 05:06:38,860 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1976 transitions. Word has length 21 [2022-01-18 05:06:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:38,860 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1976 transitions. [2022-01-18 05:06:38,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1976 transitions. [2022-01-18 05:06:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:06:38,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:38,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:38,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 05:06:39,062 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,SelfDestructingSolverStorable73 [2022-01-18 05:06:39,062 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash 224593503, now seen corresponding path program 58 times [2022-01-18 05:06:39,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:39,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981954549] [2022-01-18 05:06:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:39,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:39,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981954549] [2022-01-18 05:06:39,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981954549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987937570] [2022-01-18 05:06:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:39,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:39,171 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) [2022-01-18 05:06:39,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 05:06:39,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:39,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:39,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:39,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:39,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2022-01-18 05:06:39,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-01-18 05:06:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:39,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:39,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 269 [2022-01-18 05:06:40,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:40,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 05:06:40,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:40,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987937570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:40,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:40,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:06:40,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317410751] [2022-01-18 05:06:40,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:40,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:40,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:40,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:40,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:40,181 INFO L87 Difference]: Start difference. First operand 638 states and 1976 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:41,038 INFO L93 Difference]: Finished difference Result 1340 states and 3987 transitions. [2022-01-18 05:06:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:06:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:06:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:41,040 INFO L225 Difference]: With dead ends: 1340 [2022-01-18 05:06:41,040 INFO L226 Difference]: Without dead ends: 1209 [2022-01-18 05:06:41,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:06:41,040 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 151 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:41,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 400 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:06:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-01-18 05:06:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 633. [2022-01-18 05:06:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.098101265822785) internal successors, (1958), 632 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1958 transitions. [2022-01-18 05:06:41,049 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1958 transitions. Word has length 21 [2022-01-18 05:06:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:41,049 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1958 transitions. [2022-01-18 05:06:41,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1958 transitions. [2022-01-18 05:06:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:41,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:41,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:41,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:41,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 05:06:41,250 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1282730021, now seen corresponding path program 59 times [2022-01-18 05:06:41,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:41,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655635717] [2022-01-18 05:06:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:41,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:06:41,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655635717] [2022-01-18 05:06:41,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655635717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845926528] [2022-01-18 05:06:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:41,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:41,368 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) [2022-01-18 05:06:41,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 05:06:41,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:41,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:41,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 05:06:41,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:06:41,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 05:06:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:41,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:42,004 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:06:42,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:42,092 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:06:42,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-01-18 05:06:42,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-01-18 05:06:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:42,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845926528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:42,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:42,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 05:06:42,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746868356] [2022-01-18 05:06:42,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:42,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:06:42,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:06:42,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:06:42,152 INFO L87 Difference]: Start difference. First operand 633 states and 1958 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) [2022-01-18 05:06:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:42,991 INFO L93 Difference]: Finished difference Result 1169 states and 3449 transitions. [2022-01-18 05:06:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:06:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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 22 [2022-01-18 05:06:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:42,993 INFO L225 Difference]: With dead ends: 1169 [2022-01-18 05:06:42,993 INFO L226 Difference]: Without dead ends: 1051 [2022-01-18 05:06:42,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:06:42,993 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 272 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:42,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 230 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:06:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-01-18 05:06:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 621. [2022-01-18 05:06:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 3.0661290322580643) internal successors, (1901), 620 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1901 transitions. [2022-01-18 05:06:43,002 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1901 transitions. Word has length 22 [2022-01-18 05:06:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:43,002 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1901 transitions. [2022-01-18 05:06:43,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) [2022-01-18 05:06:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1901 transitions. [2022-01-18 05:06:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:43,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:43,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:43,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 05:06:43,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:43,204 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1147863917, now seen corresponding path program 60 times [2022-01-18 05:06:43,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:43,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886357779] [2022-01-18 05:06:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:43,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:43,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:43,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886357779] [2022-01-18 05:06:43,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886357779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:43,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062677228] [2022-01-18 05:06:43,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:43,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:43,331 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) [2022-01-18 05:06:43,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 05:06:43,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:43,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:43,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:43,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:06:43,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 05:06:43,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-01-18 05:06:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:43,886 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:06:43,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:43,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:43,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:06:43,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:43,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 05:06:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:44,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062677228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:44,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:44,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 05:06:44,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595623358] [2022-01-18 05:06:44,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:44,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:44,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:44,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:44,056 INFO L87 Difference]: Start difference. First operand 621 states and 1901 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:45,826 INFO L93 Difference]: Finished difference Result 1197 states and 3470 transitions. [2022-01-18 05:06:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:06:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:45,829 INFO L225 Difference]: With dead ends: 1197 [2022-01-18 05:06:45,829 INFO L226 Difference]: Without dead ends: 1053 [2022-01-18 05:06:45,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:06:45,829 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 267 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:45,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 269 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:06:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-18 05:06:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 614. [2022-01-18 05:06:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.0489396411092984) internal successors, (1869), 613 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1869 transitions. [2022-01-18 05:06:45,838 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1869 transitions. Word has length 22 [2022-01-18 05:06:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:45,838 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1869 transitions. [2022-01-18 05:06:45,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1869 transitions. [2022-01-18 05:06:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:45,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:45,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:45,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 05:06:46,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:46,039 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2060685251, now seen corresponding path program 61 times [2022-01-18 05:06:46,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:46,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571639690] [2022-01-18 05:06:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:46,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:46,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:46,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571639690] [2022-01-18 05:06:46,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571639690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:46,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769513178] [2022-01-18 05:06:46,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:46,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:46,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:46,131 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) [2022-01-18 05:06:46,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 05:06:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:46,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:46,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 05:06:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:46,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:46,627 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:06:46,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:46,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:46,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:06:46,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:46,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 05:06:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:46,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769513178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:46,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:46,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 05:06:46,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849227745] [2022-01-18 05:06:46,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:46,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:46,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:46,840 INFO L87 Difference]: Start difference. First operand 614 states and 1869 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:47,667 INFO L93 Difference]: Finished difference Result 942 states and 2778 transitions. [2022-01-18 05:06:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:06:47,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:47,669 INFO L225 Difference]: With dead ends: 942 [2022-01-18 05:06:47,669 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 05:06:47,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:06:47,670 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:47,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 192 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:06:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 05:06:47,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 614. [2022-01-18 05:06:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.0375203915171287) internal successors, (1862), 613 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1862 transitions. [2022-01-18 05:06:47,680 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1862 transitions. Word has length 22 [2022-01-18 05:06:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:47,680 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1862 transitions. [2022-01-18 05:06:47,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1862 transitions. [2022-01-18 05:06:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:47,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:47,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:47,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:47,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 05:06:47,906 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash -477873133, now seen corresponding path program 62 times [2022-01-18 05:06:47,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:47,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575444657] [2022-01-18 05:06:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:47,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:48,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:48,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575444657] [2022-01-18 05:06:48,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575444657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:48,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238533981] [2022-01-18 05:06:48,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:48,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:48,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:48,008 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) [2022-01-18 05:06:48,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 05:06:48,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:48,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:48,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:48,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:06:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:48,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:48,472 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:06:48,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:48,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:48,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:06:48,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:48,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 05:06:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:48,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238533981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:48,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:48,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 05:06:48,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989668234] [2022-01-18 05:06:48,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:48,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:48,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:48,627 INFO L87 Difference]: Start difference. First operand 614 states and 1862 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:50,047 INFO L93 Difference]: Finished difference Result 1251 states and 3666 transitions. [2022-01-18 05:06:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:06:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:50,049 INFO L225 Difference]: With dead ends: 1251 [2022-01-18 05:06:50,049 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 05:06:50,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=469, Invalid=1601, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:06:50,049 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 203 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:50,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 342 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:06:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 05:06:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 516. [2022-01-18 05:06:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.0699029126213593) internal successors, (1581), 515 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1581 transitions. [2022-01-18 05:06:50,057 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1581 transitions. Word has length 22 [2022-01-18 05:06:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:50,057 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1581 transitions. [2022-01-18 05:06:50,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1581 transitions. [2022-01-18 05:06:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:50,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:50,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:50,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:50,258 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,SelfDestructingSolverStorable78 [2022-01-18 05:06:50,258 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1263541605, now seen corresponding path program 63 times [2022-01-18 05:06:50,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:50,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936926240] [2022-01-18 05:06:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:50,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:50,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:50,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936926240] [2022-01-18 05:06:50,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936926240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:50,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214239736] [2022-01-18 05:06:50,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:50,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:50,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:50,451 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) [2022-01-18 05:06:50,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 05:06:50,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:06:50,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:50,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:50,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:50,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:06:51,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:51,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:06:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:51,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:06:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:51,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:51,295 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:06:51,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:51,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:51,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:06:51,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:51,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 05:06:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:51,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214239736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:51,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:51,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 05:06:51,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314971048] [2022-01-18 05:06:51,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:51,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:06:51,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:06:51,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:06:51,475 INFO L87 Difference]: Start difference. First operand 516 states and 1581 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:51,747 INFO L93 Difference]: Finished difference Result 749 states and 2218 transitions. [2022-01-18 05:06:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:06:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:51,749 INFO L225 Difference]: With dead ends: 749 [2022-01-18 05:06:51,749 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 05:06:51,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:06:51,749 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:51,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 166 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 400 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-01-18 05:06:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 05:06:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 527. [2022-01-18 05:06:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.093155893536122) internal successors, (1627), 526 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1627 transitions. [2022-01-18 05:06:51,756 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1627 transitions. Word has length 22 [2022-01-18 05:06:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:51,756 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1627 transitions. [2022-01-18 05:06:51,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1627 transitions. [2022-01-18 05:06:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:51,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:51,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:51,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 05:06:51,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:51,958 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:51,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1536822727, now seen corresponding path program 64 times [2022-01-18 05:06:51,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:51,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943729957] [2022-01-18 05:06:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:51,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:52,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:52,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943729957] [2022-01-18 05:06:52,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943729957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:52,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292910807] [2022-01-18 05:06:52,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:52,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:52,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:52,147 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) [2022-01-18 05:06:52,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 05:06:52,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:52,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:52,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:52,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 05:06:52,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:52,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:06:52,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:52,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:06:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:52,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:52,826 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:06:52,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:52,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:52,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:06:52,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:52,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 05:06:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:53,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292910807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:53,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:53,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 05:06:53,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097524195] [2022-01-18 05:06:53,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:53,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:53,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:53,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:53,018 INFO L87 Difference]: Start difference. First operand 527 states and 1627 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:53,319 INFO L93 Difference]: Finished difference Result 704 states and 2090 transitions. [2022-01-18 05:06:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:06:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:53,320 INFO L225 Difference]: With dead ends: 704 [2022-01-18 05:06:53,320 INFO L226 Difference]: Without dead ends: 694 [2022-01-18 05:06:53,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:06:53,321 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:53,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 141 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 303 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-01-18 05:06:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-18 05:06:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 534. [2022-01-18 05:06:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.073170731707317) internal successors, (1638), 533 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1638 transitions. [2022-01-18 05:06:53,327 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1638 transitions. Word has length 22 [2022-01-18 05:06:53,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:53,327 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1638 transitions. [2022-01-18 05:06:53,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1638 transitions. [2022-01-18 05:06:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:53,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:53,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:53,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 05:06:53,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:53,529 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:53,529 INFO L85 PathProgramCache]: Analyzing trace with hash -495747535, now seen corresponding path program 65 times [2022-01-18 05:06:53,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:53,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205406275] [2022-01-18 05:06:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:53,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:53,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205406275] [2022-01-18 05:06:53,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205406275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492162987] [2022-01-18 05:06:53,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:53,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:53,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:53,760 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) [2022-01-18 05:06:53,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 05:06:53,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:06:53,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:53,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:53,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 05:06:54,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-01-18 05:06:54,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 05:06:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:54,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:54,293 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:06:54,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:54,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:54,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:06:54,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:54,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-01-18 05:06:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:54,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492162987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:54,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:54,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 05:06:54,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123122261] [2022-01-18 05:06:54,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:54,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:06:54,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:54,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:06:54,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:06:54,449 INFO L87 Difference]: Start difference. First operand 534 states and 1638 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:55,433 INFO L93 Difference]: Finished difference Result 1283 states and 3687 transitions. [2022-01-18 05:06:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:06:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:55,435 INFO L225 Difference]: With dead ends: 1283 [2022-01-18 05:06:55,435 INFO L226 Difference]: Without dead ends: 1252 [2022-01-18 05:06:55,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:06:55,436 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 243 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:55,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 440 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:06:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-01-18 05:06:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 522. [2022-01-18 05:06:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.0863723608445297) internal successors, (1608), 521 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1608 transitions. [2022-01-18 05:06:55,444 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1608 transitions. Word has length 22 [2022-01-18 05:06:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:55,444 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1608 transitions. [2022-01-18 05:06:55,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1608 transitions. [2022-01-18 05:06:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:55,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:55,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:55,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 05:06:55,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:55,645 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1556525625, now seen corresponding path program 66 times [2022-01-18 05:06:55,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492584036] [2022-01-18 05:06:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:55,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:55,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:55,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492584036] [2022-01-18 05:06:55,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492584036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:55,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282818361] [2022-01-18 05:06:55,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:55,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:55,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:55,756 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) [2022-01-18 05:06:55,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 05:06:55,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:55,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-01-18 05:06:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:06:56,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-18 05:06:56,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:56,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:56,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:56,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:56,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-01-18 05:06:56,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-01-18 05:06:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:06:56,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282818361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:56,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:56,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 05:06:56,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692809076] [2022-01-18 05:06:56,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:56,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:56,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:56,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:56,941 INFO L87 Difference]: Start difference. First operand 522 states and 1608 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) [2022-01-18 05:06:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:57,041 INFO L93 Difference]: Finished difference Result 667 states and 2001 transitions. [2022-01-18 05:06:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:06:57,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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 22 [2022-01-18 05:06:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:57,042 INFO L225 Difference]: With dead ends: 667 [2022-01-18 05:06:57,043 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 05:06:57,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:57,043 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:57,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 80 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 221 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-01-18 05:06:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 05:06:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 492. [2022-01-18 05:06:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.061099796334012) internal successors, (1503), 491 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1503 transitions. [2022-01-18 05:06:57,049 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1503 transitions. Word has length 22 [2022-01-18 05:06:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:57,049 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1503 transitions. [2022-01-18 05:06:57,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) [2022-01-18 05:06:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1503 transitions. [2022-01-18 05:06:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:57,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:57,050 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:57,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 05:06:57,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:57,250 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash -525305780, now seen corresponding path program 67 times [2022-01-18 05:06:57,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:57,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787459954] [2022-01-18 05:06:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:57,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:06:57,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:57,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787459954] [2022-01-18 05:06:57,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787459954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:57,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579394771] [2022-01-18 05:06:57,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:57,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:57,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:57,311 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) [2022-01-18 05:06:57,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 05:06:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:06:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:57,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:06:57,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:06:57,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 131 [2022-01-18 05:06:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:06:57,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:57,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:06:58,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:58,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 05:06:58,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:06:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:06:58,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579394771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:58,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:58,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:06:58,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92068795] [2022-01-18 05:06:58,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:58,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:58,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:58,292 INFO L87 Difference]: Start difference. First operand 492 states and 1503 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:58,433 INFO L93 Difference]: Finished difference Result 617 states and 1837 transitions. [2022-01-18 05:06:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:06:58,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:58,434 INFO L225 Difference]: With dead ends: 617 [2022-01-18 05:06:58,434 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 05:06:58,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:58,434 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:58,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 88 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 05:06:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2022-01-18 05:06:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.008869179600887) internal successors, (1357), 451 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) [2022-01-18 05:06:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1357 transitions. [2022-01-18 05:06:58,440 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1357 transitions. Word has length 22 [2022-01-18 05:06:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:58,440 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1357 transitions. [2022-01-18 05:06:58,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1357 transitions. [2022-01-18 05:06:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:58,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:58,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:58,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 05:06:58,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 05:06:58,641 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222629, now seen corresponding path program 68 times [2022-01-18 05:06:58,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:58,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15032880] [2022-01-18 05:06:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:58,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:58,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15032880] [2022-01-18 05:06:58,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15032880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441010377] [2022-01-18 05:06:58,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:58,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:58,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:58,712 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) [2022-01-18 05:06:58,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 05:06:58,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:58,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:59,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:59,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:06:59,121 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:06:59,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:06:59,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:06:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:59,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441010377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:59,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:59,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:06:59,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857635765] [2022-01-18 05:06:59,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:59,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:59,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:59,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:59,129 INFO L87 Difference]: Start difference. First operand 452 states and 1357 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:59,449 INFO L93 Difference]: Finished difference Result 836 states and 2417 transitions. [2022-01-18 05:06:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:06:59,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:06:59,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:59,451 INFO L225 Difference]: With dead ends: 836 [2022-01-18 05:06:59,451 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 05:06:59,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:06:59,451 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 188 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:59,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 184 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:06:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 05:06:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 467. [2022-01-18 05:06:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 05:06:59,458 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 05:06:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:59,458 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 05:06:59,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:06:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 05:06:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:06:59,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:59,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:59,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 05:06:59,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:59,660 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -260222965, now seen corresponding path program 69 times [2022-01-18 05:06:59,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:59,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244144005] [2022-01-18 05:06:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:59,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:59,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244144005] [2022-01-18 05:06:59,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244144005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015653657] [2022-01-18 05:06:59,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:59,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:59,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:59,741 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) [2022-01-18 05:06:59,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 05:06:59,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:59,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:06:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:59,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:06:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:59,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:00,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:00,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:00,205 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:00,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:00,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:00,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015653657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:00,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:00,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:00,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773300523] [2022-01-18 05:07:00,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:00,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:00,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:00,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:00,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:00,213 INFO L87 Difference]: Start difference. First operand 467 states and 1402 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:00,677 INFO L93 Difference]: Finished difference Result 910 states and 2635 transitions. [2022-01-18 05:07:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:07:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:00,679 INFO L225 Difference]: With dead ends: 910 [2022-01-18 05:07:00,679 INFO L226 Difference]: Without dead ends: 910 [2022-01-18 05:07:00,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:07:00,679 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:00,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 283 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-01-18 05:07:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 479. [2022-01-18 05:07:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0334728033472804) internal successors, (1450), 478 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1450 transitions. [2022-01-18 05:07:00,686 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1450 transitions. Word has length 22 [2022-01-18 05:07:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:00,686 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1450 transitions. [2022-01-18 05:07:00,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1450 transitions. [2022-01-18 05:07:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:00,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:00,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:00,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 05:07:00,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:00,888 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1234379999, now seen corresponding path program 70 times [2022-01-18 05:07:00,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:00,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332903147] [2022-01-18 05:07:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:00,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:00,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:00,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332903147] [2022-01-18 05:07:00,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332903147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:00,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100333349] [2022-01-18 05:07:00,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:00,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:00,968 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) [2022-01-18 05:07:00,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 05:07:01,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:01,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:01,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:01,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:01,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:01,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:01,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:01,421 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:01,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:01,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:01,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100333349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:01,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:01,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:07:01,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457716989] [2022-01-18 05:07:01,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:01,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:01,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:01,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:01,428 INFO L87 Difference]: Start difference. First operand 479 states and 1450 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:01,773 INFO L93 Difference]: Finished difference Result 873 states and 2532 transitions. [2022-01-18 05:07:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:01,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:01,775 INFO L225 Difference]: With dead ends: 873 [2022-01-18 05:07:01,775 INFO L226 Difference]: Without dead ends: 863 [2022-01-18 05:07:01,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:01,775 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 214 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:01,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 207 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-18 05:07:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 486. [2022-01-18 05:07:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0185567010309278) internal successors, (1464), 485 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1464 transitions. [2022-01-18 05:07:01,782 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1464 transitions. Word has length 22 [2022-01-18 05:07:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:01,783 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1464 transitions. [2022-01-18 05:07:01,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1464 transitions. [2022-01-18 05:07:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:01,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:01,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:01,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 05:07:01,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:01,985 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash 915267679, now seen corresponding path program 71 times [2022-01-18 05:07:01,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:01,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090665253] [2022-01-18 05:07:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:01,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:02,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090665253] [2022-01-18 05:07:02,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090665253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984535294] [2022-01-18 05:07:02,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:02,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:02,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:02,083 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) [2022-01-18 05:07:02,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 05:07:02,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:02,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:02,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:02,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:02,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:02,535 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:02,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:02,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:02,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984535294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:02,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:02,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:02,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803101605] [2022-01-18 05:07:02,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:02,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:02,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:02,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:02,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:02,542 INFO L87 Difference]: Start difference. First operand 486 states and 1464 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:02,864 INFO L93 Difference]: Finished difference Result 822 states and 2399 transitions. [2022-01-18 05:07:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:02,864 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:02,865 INFO L225 Difference]: With dead ends: 822 [2022-01-18 05:07:02,865 INFO L226 Difference]: Without dead ends: 822 [2022-01-18 05:07:02,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:02,865 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 187 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:02,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 203 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-01-18 05:07:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 467. [2022-01-18 05:07:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 05:07:02,872 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 05:07:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:02,872 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 05:07:02,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 05:07:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:02,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:02,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:02,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 05:07:03,084 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,SelfDestructingSolverStorable87 [2022-01-18 05:07:03,084 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1143347419, now seen corresponding path program 72 times [2022-01-18 05:07:03,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:03,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275609059] [2022-01-18 05:07:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:03,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:03,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:03,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275609059] [2022-01-18 05:07:03,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275609059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:03,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669287232] [2022-01-18 05:07:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:03,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:03,167 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) [2022-01-18 05:07:03,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 05:07:03,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:03,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:03,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:03,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:03,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:03,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:03,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:03,754 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:03,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:03,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:03,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669287232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:03,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:03,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:03,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754866381] [2022-01-18 05:07:03,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:03,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:03,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:03,761 INFO L87 Difference]: Start difference. First operand 467 states and 1402 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:04,163 INFO L93 Difference]: Finished difference Result 707 states and 2046 transitions. [2022-01-18 05:07:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:07:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:04,164 INFO L225 Difference]: With dead ends: 707 [2022-01-18 05:07:04,164 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 05:07:04,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:07:04,167 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:04,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 187 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 05:07:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 476. [2022-01-18 05:07:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0210526315789474) internal successors, (1435), 475 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1435 transitions. [2022-01-18 05:07:04,174 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1435 transitions. Word has length 22 [2022-01-18 05:07:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:04,174 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1435 transitions. [2022-01-18 05:07:04,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1435 transitions. [2022-01-18 05:07:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:04,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:04,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:04,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 05:07:04,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:04,375 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:04,375 INFO L85 PathProgramCache]: Analyzing trace with hash 351255545, now seen corresponding path program 73 times [2022-01-18 05:07:04,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:04,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406679286] [2022-01-18 05:07:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:04,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:04,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:04,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406679286] [2022-01-18 05:07:04,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406679286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676833420] [2022-01-18 05:07:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:04,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:04,465 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) [2022-01-18 05:07:04,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 05:07:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:04,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:04,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:04,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:04,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:04,942 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:04,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:04,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:04,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676833420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:04,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:04,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:04,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371140900] [2022-01-18 05:07:04,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:04,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:04,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:04,949 INFO L87 Difference]: Start difference. First operand 476 states and 1435 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:05,345 INFO L93 Difference]: Finished difference Result 731 states and 2111 transitions. [2022-01-18 05:07:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:05,347 INFO L225 Difference]: With dead ends: 731 [2022-01-18 05:07:05,347 INFO L226 Difference]: Without dead ends: 721 [2022-01-18 05:07:05,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:05,347 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 191 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:05,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 220 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-18 05:07:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 473. [2022-01-18 05:07:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.014830508474576) internal successors, (1423), 472 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1423 transitions. [2022-01-18 05:07:05,353 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1423 transitions. Word has length 22 [2022-01-18 05:07:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:05,353 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1423 transitions. [2022-01-18 05:07:05,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1423 transitions. [2022-01-18 05:07:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:05,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:05,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:05,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:05,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:05,554 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:05,555 INFO L85 PathProgramCache]: Analyzing trace with hash 776202755, now seen corresponding path program 74 times [2022-01-18 05:07:05,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:05,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712990214] [2022-01-18 05:07:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:05,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:05,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:05,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712990214] [2022-01-18 05:07:05,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712990214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:05,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926888927] [2022-01-18 05:07:05,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:05,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:05,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:05,627 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) [2022-01-18 05:07:05,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 05:07:05,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:05,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:05,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:05,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:06,114 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:06,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:06,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:06,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926888927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:06,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:06,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:06,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676300724] [2022-01-18 05:07:06,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:06,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:06,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:06,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:06,121 INFO L87 Difference]: Start difference. First operand 473 states and 1423 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:06,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:06,470 INFO L93 Difference]: Finished difference Result 694 states and 2019 transitions. [2022-01-18 05:07:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:06,470 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:06,471 INFO L225 Difference]: With dead ends: 694 [2022-01-18 05:07:06,471 INFO L226 Difference]: Without dead ends: 674 [2022-01-18 05:07:06,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:07:06,471 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:06,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 217 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-18 05:07:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 470. [2022-01-18 05:07:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.008528784648188) internal successors, (1411), 469 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1411 transitions. [2022-01-18 05:07:06,477 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1411 transitions. Word has length 22 [2022-01-18 05:07:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:06,477 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1411 transitions. [2022-01-18 05:07:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1411 transitions. [2022-01-18 05:07:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:06,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:06,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:06,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 05:07:06,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:06,678 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:06,679 INFO L85 PathProgramCache]: Analyzing trace with hash 937124177, now seen corresponding path program 75 times [2022-01-18 05:07:06,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:06,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128189437] [2022-01-18 05:07:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:06,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:06,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128189437] [2022-01-18 05:07:06,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128189437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428255848] [2022-01-18 05:07:06,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:06,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:06,752 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) [2022-01-18 05:07:06,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 05:07:06,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:06,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:06,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:06,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:07,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:07,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:07,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:07:07,270 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:07,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:07,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:07,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428255848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:07,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:07,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:07,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230285807] [2022-01-18 05:07:07,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:07,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:07,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:07,277 INFO L87 Difference]: Start difference. First operand 470 states and 1411 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:07,648 INFO L93 Difference]: Finished difference Result 760 states and 2194 transitions. [2022-01-18 05:07:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:07,650 INFO L225 Difference]: With dead ends: 760 [2022-01-18 05:07:07,650 INFO L226 Difference]: Without dead ends: 760 [2022-01-18 05:07:07,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:07:07,650 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:07,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 207 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-18 05:07:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 482. [2022-01-18 05:07:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0395010395010393) internal successors, (1462), 481 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1462 transitions. [2022-01-18 05:07:07,657 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1462 transitions. Word has length 22 [2022-01-18 05:07:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:07,657 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1462 transitions. [2022-01-18 05:07:07,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1462 transitions. [2022-01-18 05:07:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:07,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:07,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:07,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 05:07:07,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:07,859 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1863240155, now seen corresponding path program 76 times [2022-01-18 05:07:07,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:07,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551482563] [2022-01-18 05:07:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:07,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:07,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551482563] [2022-01-18 05:07:07,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551482563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936321725] [2022-01-18 05:07:07,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:07,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:07,940 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) [2022-01-18 05:07:07,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 05:07:08,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:08,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:08,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:08,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:08,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:08,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:07:08,427 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:08,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:08,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:08,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936321725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:08,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:08,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:08,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900627365] [2022-01-18 05:07:08,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:08,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:08,435 INFO L87 Difference]: Start difference. First operand 482 states and 1462 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:08,702 INFO L93 Difference]: Finished difference Result 741 states and 2142 transitions. [2022-01-18 05:07:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:07:08,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:08,704 INFO L225 Difference]: With dead ends: 741 [2022-01-18 05:07:08,704 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 05:07:08,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:07:08,704 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:08,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 167 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 05:07:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 489. [2022-01-18 05:07:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.0245901639344264) internal successors, (1476), 488 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1476 transitions. [2022-01-18 05:07:08,710 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1476 transitions. Word has length 22 [2022-01-18 05:07:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:08,710 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1476 transitions. [2022-01-18 05:07:08,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1476 transitions. [2022-01-18 05:07:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:08,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:08,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:08,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:08,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:08,912 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2112614821, now seen corresponding path program 77 times [2022-01-18 05:07:08,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:08,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773942807] [2022-01-18 05:07:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:08,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:08,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:08,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773942807] [2022-01-18 05:07:08,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773942807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:08,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207598978] [2022-01-18 05:07:08,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:08,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:08,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:09,000 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) [2022-01-18 05:07:09,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 05:07:09,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:09,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:09,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:09,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 05:07:09,515 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:09,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:09,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:09,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207598978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:09,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:09,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:09,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46919870] [2022-01-18 05:07:09,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:09,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:09,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:09,522 INFO L87 Difference]: Start difference. First operand 489 states and 1476 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:09,863 INFO L93 Difference]: Finished difference Result 666 states and 1943 transitions. [2022-01-18 05:07:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:09,864 INFO L225 Difference]: With dead ends: 666 [2022-01-18 05:07:09,864 INFO L226 Difference]: Without dead ends: 666 [2022-01-18 05:07:09,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:09,864 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 131 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:09,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 191 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-18 05:07:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 467. [2022-01-18 05:07:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 05:07:09,870 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 05:07:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:09,870 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 05:07:09,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 05:07:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:09,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:09,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:09,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 05:07:10,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:10,071 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash -359358453, now seen corresponding path program 78 times [2022-01-18 05:07:10,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070538513] [2022-01-18 05:07:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:10,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:10,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070538513] [2022-01-18 05:07:10,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070538513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600794954] [2022-01-18 05:07:10,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:10,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:10,158 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) [2022-01-18 05:07:10,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 05:07:10,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:10,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:10,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:10,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:10,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:10,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:10,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:10,668 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:10,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:10,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:10,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600794954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:10,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:10,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:10,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868497060] [2022-01-18 05:07:10,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:10,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:10,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:10,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:10,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:10,675 INFO L87 Difference]: Start difference. First operand 467 states and 1402 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:11,070 INFO L93 Difference]: Finished difference Result 836 states and 2421 transitions. [2022-01-18 05:07:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:11,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:11,071 INFO L225 Difference]: With dead ends: 836 [2022-01-18 05:07:11,071 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 05:07:11,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:11,072 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 179 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:11,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 267 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 05:07:11,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 485. [2022-01-18 05:07:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.0330578512396693) internal successors, (1468), 484 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1468 transitions. [2022-01-18 05:07:11,080 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1468 transitions. Word has length 22 [2022-01-18 05:07:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:11,080 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1468 transitions. [2022-01-18 05:07:11,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1468 transitions. [2022-01-18 05:07:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:11,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:11,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:11,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 05:07:11,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-01-18 05:07:11,281 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1135244511, now seen corresponding path program 79 times [2022-01-18 05:07:11,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:11,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556284569] [2022-01-18 05:07:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:11,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:11,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:11,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556284569] [2022-01-18 05:07:11,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556284569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:11,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473826741] [2022-01-18 05:07:11,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:11,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:11,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:11,363 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) [2022-01-18 05:07:11,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 05:07:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:11,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:11,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:11,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:11,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:11,858 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:11,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:11,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473826741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:11,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:11,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013864532] [2022-01-18 05:07:11,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:11,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:11,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:11,865 INFO L87 Difference]: Start difference. First operand 485 states and 1468 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:12,474 INFO L93 Difference]: Finished difference Result 859 states and 2477 transitions. [2022-01-18 05:07:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:07:12,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:12,476 INFO L225 Difference]: With dead ends: 859 [2022-01-18 05:07:12,476 INFO L226 Difference]: Without dead ends: 849 [2022-01-18 05:07:12,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:07:12,476 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 234 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:12,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 251 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-18 05:07:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 482. [2022-01-18 05:07:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.027027027027027) internal successors, (1456), 481 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1456 transitions. [2022-01-18 05:07:12,483 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1456 transitions. Word has length 22 [2022-01-18 05:07:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:12,483 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1456 transitions. [2022-01-18 05:07:12,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1456 transitions. [2022-01-18 05:07:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:12,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:12,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:12,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 05:07:12,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:12,684 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1560191721, now seen corresponding path program 80 times [2022-01-18 05:07:12,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:12,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584485638] [2022-01-18 05:07:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:12,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:12,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584485638] [2022-01-18 05:07:12,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584485638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969835213] [2022-01-18 05:07:12,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:12,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:12,756 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) [2022-01-18 05:07:12,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 05:07:12,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:12,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:12,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:13,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:13,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:13,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:13,228 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:13,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:13,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:13,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969835213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:13,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:13,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:13,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194057068] [2022-01-18 05:07:13,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:13,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:13,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:13,238 INFO L87 Difference]: Start difference. First operand 482 states and 1456 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:13,654 INFO L93 Difference]: Finished difference Result 853 states and 2477 transitions. [2022-01-18 05:07:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:07:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:13,655 INFO L225 Difference]: With dead ends: 853 [2022-01-18 05:07:13,655 INFO L226 Difference]: Without dead ends: 833 [2022-01-18 05:07:13,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:07:13,656 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 198 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:13,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 224 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-18 05:07:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 479. [2022-01-18 05:07:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0209205020920504) internal successors, (1444), 478 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1444 transitions. [2022-01-18 05:07:13,664 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1444 transitions. Word has length 22 [2022-01-18 05:07:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:13,664 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1444 transitions. [2022-01-18 05:07:13,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1444 transitions. [2022-01-18 05:07:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:13,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:13,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:13,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:13,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:13,865 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash -963179015, now seen corresponding path program 81 times [2022-01-18 05:07:13,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:13,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556576242] [2022-01-18 05:07:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:13,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:13,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556576242] [2022-01-18 05:07:13,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556576242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105552076] [2022-01-18 05:07:13,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:13,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:13,937 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) [2022-01-18 05:07:13,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 05:07:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:14,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:14,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:14,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:14,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:14,398 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:14,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:14,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:14,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105552076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:14,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:14,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:14,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507527289] [2022-01-18 05:07:14,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:14,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:14,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:14,405 INFO L87 Difference]: Start difference. First operand 479 states and 1444 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:14,788 INFO L93 Difference]: Finished difference Result 788 states and 2279 transitions. [2022-01-18 05:07:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:14,789 INFO L225 Difference]: With dead ends: 788 [2022-01-18 05:07:14,789 INFO L226 Difference]: Without dead ends: 752 [2022-01-18 05:07:14,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:14,789 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 197 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:14,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 224 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-18 05:07:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 473. [2022-01-18 05:07:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.0084745762711864) internal successors, (1420), 472 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1420 transitions. [2022-01-18 05:07:14,795 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1420 transitions. Word has length 22 [2022-01-18 05:07:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:14,796 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1420 transitions. [2022-01-18 05:07:14,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1420 transitions. [2022-01-18 05:07:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:14,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:14,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:14,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 05:07:14,997 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,SelfDestructingSolverStorable97 [2022-01-18 05:07:14,997 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash 978208761, now seen corresponding path program 82 times [2022-01-18 05:07:14,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:14,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038572268] [2022-01-18 05:07:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:14,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:15,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038572268] [2022-01-18 05:07:15,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038572268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414019342] [2022-01-18 05:07:15,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:15,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:15,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:15,069 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) [2022-01-18 05:07:15,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 05:07:15,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:15,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:15,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:15,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:15,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:15,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:15,671 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:15,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:15,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:15,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414019342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:15,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:15,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:15,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85866730] [2022-01-18 05:07:15,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:15,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:15,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:15,679 INFO L87 Difference]: Start difference. First operand 473 states and 1420 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:15,939 INFO L93 Difference]: Finished difference Result 725 states and 2103 transitions. [2022-01-18 05:07:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:07:15,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:15,941 INFO L225 Difference]: With dead ends: 725 [2022-01-18 05:07:15,941 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 05:07:15,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:07:15,941 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:15,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 158 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 05:07:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 482. [2022-01-18 05:07:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0207900207900207) internal successors, (1453), 481 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1453 transitions. [2022-01-18 05:07:15,948 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1453 transitions. Word has length 22 [2022-01-18 05:07:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:15,948 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1453 transitions. [2022-01-18 05:07:15,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1453 transitions. [2022-01-18 05:07:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:15,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:15,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:15,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 05:07:16,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:16,152 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:16,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1822155571, now seen corresponding path program 83 times [2022-01-18 05:07:16,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:16,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753105490] [2022-01-18 05:07:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:16,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:16,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753105490] [2022-01-18 05:07:16,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753105490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196029007] [2022-01-18 05:07:16,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:16,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:16,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:16,239 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) [2022-01-18 05:07:16,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 05:07:16,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:16,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:16,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:16,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:16,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:07:16,814 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:16,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:16,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:16,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196029007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:16,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:16,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:16,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070862958] [2022-01-18 05:07:16,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:16,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:16,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:16,821 INFO L87 Difference]: Start difference. First operand 482 states and 1453 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:17,210 INFO L93 Difference]: Finished difference Result 752 states and 2177 transitions. [2022-01-18 05:07:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:17,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:17,211 INFO L225 Difference]: With dead ends: 752 [2022-01-18 05:07:17,211 INFO L226 Difference]: Without dead ends: 742 [2022-01-18 05:07:17,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:07:17,212 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 215 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:17,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 196 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-18 05:07:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 479. [2022-01-18 05:07:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.014644351464435) internal successors, (1441), 478 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1441 transitions. [2022-01-18 05:07:17,218 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1441 transitions. Word has length 22 [2022-01-18 05:07:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:17,218 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1441 transitions. [2022-01-18 05:07:17,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1441 transitions. [2022-01-18 05:07:17,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:17,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:17,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:17,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 05:07:17,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:17,419 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:17,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1397208361, now seen corresponding path program 84 times [2022-01-18 05:07:17,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:17,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788012224] [2022-01-18 05:07:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:17,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:17,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788012224] [2022-01-18 05:07:17,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788012224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156088968] [2022-01-18 05:07:17,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:17,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:17,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:17,482 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) [2022-01-18 05:07:17,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 05:07:17,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:07:17,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:17,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:17,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:17,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:17,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:17,946 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:17,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:17,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:17,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156088968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:17,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:17,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:17,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95184303] [2022-01-18 05:07:17,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:17,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:17,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:17,953 INFO L87 Difference]: Start difference. First operand 479 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:18,265 INFO L93 Difference]: Finished difference Result 706 states and 2058 transitions. [2022-01-18 05:07:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:18,266 INFO L225 Difference]: With dead ends: 706 [2022-01-18 05:07:18,266 INFO L226 Difference]: Without dead ends: 686 [2022-01-18 05:07:18,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:07:18,267 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 166 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:18,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 184 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-18 05:07:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 476. [2022-01-18 05:07:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.008421052631579) internal successors, (1429), 475 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1429 transitions. [2022-01-18 05:07:18,273 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1429 transitions. Word has length 22 [2022-01-18 05:07:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:18,273 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1429 transitions. [2022-01-18 05:07:18,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1429 transitions. [2022-01-18 05:07:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:18,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:18,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:18,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:18,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 05:07:18,481 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1236286939, now seen corresponding path program 85 times [2022-01-18 05:07:18,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:18,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800710487] [2022-01-18 05:07:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:18,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:18,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:18,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800710487] [2022-01-18 05:07:18,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800710487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:18,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857974784] [2022-01-18 05:07:18,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:18,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:18,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:18,570 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) [2022-01-18 05:07:18,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 05:07:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:18,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:18,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:18,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:18,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:18,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:07:19,063 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:19,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:19,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:19,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857974784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:19,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:19,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:19,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481294781] [2022-01-18 05:07:19,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:19,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:19,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:19,070 INFO L87 Difference]: Start difference. First operand 476 states and 1429 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:19,349 INFO L93 Difference]: Finished difference Result 766 states and 2218 transitions. [2022-01-18 05:07:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:19,350 INFO L225 Difference]: With dead ends: 766 [2022-01-18 05:07:19,350 INFO L226 Difference]: Without dead ends: 766 [2022-01-18 05:07:19,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:19,351 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:19,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 157 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-01-18 05:07:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 488. [2022-01-18 05:07:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.0328542094455853) internal successors, (1477), 487 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1477 transitions. [2022-01-18 05:07:19,357 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1477 transitions. Word has length 22 [2022-01-18 05:07:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:19,357 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1477 transitions. [2022-01-18 05:07:19,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1477 transitions. [2022-01-18 05:07:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:19,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:19,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:19,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 05:07:19,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 05:07:19,558 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 258316025, now seen corresponding path program 86 times [2022-01-18 05:07:19,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:19,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482697682] [2022-01-18 05:07:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:19,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:19,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:19,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482697682] [2022-01-18 05:07:19,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482697682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:19,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698096231] [2022-01-18 05:07:19,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:19,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:19,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:19,634 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) [2022-01-18 05:07:19,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 05:07:19,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:19,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:19,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:19,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:20,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:20,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:07:20,114 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:20,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:20,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698096231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:20,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:20,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:20,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563259798] [2022-01-18 05:07:20,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:20,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:20,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:20,121 INFO L87 Difference]: Start difference. First operand 488 states and 1477 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:20,424 INFO L93 Difference]: Finished difference Result 750 states and 2175 transitions. [2022-01-18 05:07:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:07:20,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:20,426 INFO L225 Difference]: With dead ends: 750 [2022-01-18 05:07:20,426 INFO L226 Difference]: Without dead ends: 740 [2022-01-18 05:07:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:07:20,426 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:20,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 197 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-01-18 05:07:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 495. [2022-01-18 05:07:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.0182186234817814) internal successors, (1491), 494 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1491 transitions. [2022-01-18 05:07:20,434 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1491 transitions. Word has length 22 [2022-01-18 05:07:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:20,434 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1491 transitions. [2022-01-18 05:07:20,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1491 transitions. [2022-01-18 05:07:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:20,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:20,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:20,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:20,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:20,657 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash -60796295, now seen corresponding path program 87 times [2022-01-18 05:07:20,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:20,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117936705] [2022-01-18 05:07:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:20,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:20,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:20,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117936705] [2022-01-18 05:07:20,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117936705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:20,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980864775] [2022-01-18 05:07:20,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:20,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:20,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:20,742 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) [2022-01-18 05:07:20,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 05:07:20,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:20,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:20,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:21,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:21,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:21,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:07:21,243 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:21,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:21,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:21,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980864775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:21,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:21,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800672672] [2022-01-18 05:07:21,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:21,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:21,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:21,251 INFO L87 Difference]: Start difference. First operand 495 states and 1491 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:21,511 INFO L93 Difference]: Finished difference Result 678 states and 1982 transitions. [2022-01-18 05:07:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:07:21,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:21,512 INFO L225 Difference]: With dead ends: 678 [2022-01-18 05:07:21,512 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 05:07:21,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:07:21,512 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 129 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:21,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 152 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 05:07:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 467. [2022-01-18 05:07:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0085836909871246) internal successors, (1402), 466 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1402 transitions. [2022-01-18 05:07:21,518 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1402 transitions. Word has length 22 [2022-01-18 05:07:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1402 transitions. [2022-01-18 05:07:21,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1402 transitions. [2022-01-18 05:07:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:21,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:21,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:21,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 05:07:21,719 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,SelfDestructingSolverStorable103 [2022-01-18 05:07:21,720 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash -888840437, now seen corresponding path program 88 times [2022-01-18 05:07:21,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019325752] [2022-01-18 05:07:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:21,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:21,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:21,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019325752] [2022-01-18 05:07:21,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019325752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:21,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772048801] [2022-01-18 05:07:21,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:21,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:21,796 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) [2022-01-18 05:07:21,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 05:07:21,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:21,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:22,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:22,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:22,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:22,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:22,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:22,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:22,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772048801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:22,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:22,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:07:22,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204387481] [2022-01-18 05:07:22,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:22,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:22,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:22,253 INFO L87 Difference]: Start difference. First operand 467 states and 1402 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:22,702 INFO L93 Difference]: Finished difference Result 850 states and 2502 transitions. [2022-01-18 05:07:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:22,703 INFO L225 Difference]: With dead ends: 850 [2022-01-18 05:07:22,703 INFO L226 Difference]: Without dead ends: 850 [2022-01-18 05:07:22,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:22,704 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 136 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:22,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 302 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-18 05:07:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 474. [2022-01-18 05:07:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.0084566596194504) internal successors, (1423), 473 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1423 transitions. [2022-01-18 05:07:22,711 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1423 transitions. Word has length 22 [2022-01-18 05:07:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:22,711 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1423 transitions. [2022-01-18 05:07:22,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1423 transitions. [2022-01-18 05:07:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:22,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:22,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:22,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 05:07:22,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-01-18 05:07:22,912 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1170681265, now seen corresponding path program 89 times [2022-01-18 05:07:22,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:22,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621625547] [2022-01-18 05:07:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:22,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:23,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:23,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621625547] [2022-01-18 05:07:23,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621625547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:23,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889172540] [2022-01-18 05:07:23,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:23,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:23,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:23,006 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) [2022-01-18 05:07:23,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 05:07:23,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:23,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:23,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:23,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:23,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:23,541 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:23,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:23,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889172540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:23,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:23,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:23,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606380235] [2022-01-18 05:07:23,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:23,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:23,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:23,548 INFO L87 Difference]: Start difference. First operand 474 states and 1423 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:23,985 INFO L93 Difference]: Finished difference Result 912 states and 2684 transitions. [2022-01-18 05:07:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:07:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:23,986 INFO L225 Difference]: With dead ends: 912 [2022-01-18 05:07:23,986 INFO L226 Difference]: Without dead ends: 912 [2022-01-18 05:07:23,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:07:23,987 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 199 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:23,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 215 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-18 05:07:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 486. [2022-01-18 05:07:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0329896907216494) internal successors, (1471), 485 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1471 transitions. [2022-01-18 05:07:23,994 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1471 transitions. Word has length 22 [2022-01-18 05:07:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:23,994 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1471 transitions. [2022-01-18 05:07:23,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1471 transitions. [2022-01-18 05:07:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:23,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:23,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:24,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:24,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 05:07:24,195 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1629683067, now seen corresponding path program 90 times [2022-01-18 05:07:24,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:24,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817288928] [2022-01-18 05:07:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:24,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:24,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817288928] [2022-01-18 05:07:24,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817288928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791655160] [2022-01-18 05:07:24,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:24,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:24,281 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) [2022-01-18 05:07:24,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 05:07:24,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:24,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:24,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:24,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:24,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:24,769 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:24,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:24,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:24,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791655160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:24,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:24,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:07:24,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499986423] [2022-01-18 05:07:24,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:24,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:24,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:24,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:24,776 INFO L87 Difference]: Start difference. First operand 486 states and 1471 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:25,136 INFO L93 Difference]: Finished difference Result 882 states and 2603 transitions. [2022-01-18 05:07:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:25,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:25,137 INFO L225 Difference]: With dead ends: 882 [2022-01-18 05:07:25,137 INFO L226 Difference]: Without dead ends: 872 [2022-01-18 05:07:25,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:25,138 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 165 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:25,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 200 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-18 05:07:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 493. [2022-01-18 05:07:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.018292682926829) internal successors, (1485), 492 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1485 transitions. [2022-01-18 05:07:25,145 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1485 transitions. Word has length 22 [2022-01-18 05:07:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:25,145 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1485 transitions. [2022-01-18 05:07:25,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1485 transitions. [2022-01-18 05:07:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:25,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:25,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:25,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 05:07:25,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:25,347 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1948795387, now seen corresponding path program 91 times [2022-01-18 05:07:25,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:25,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662914459] [2022-01-18 05:07:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:25,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:25,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:25,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662914459] [2022-01-18 05:07:25,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662914459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:25,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133558877] [2022-01-18 05:07:25,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:25,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:25,440 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) [2022-01-18 05:07:25,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 05:07:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:25,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:25,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:25,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:25,931 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:25,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:25,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:25,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133558877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:25,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:25,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:25,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527724908] [2022-01-18 05:07:25,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:25,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:25,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:25,938 INFO L87 Difference]: Start difference. First operand 493 states and 1485 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:26,438 INFO L93 Difference]: Finished difference Result 821 states and 2439 transitions. [2022-01-18 05:07:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:26,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:26,440 INFO L225 Difference]: With dead ends: 821 [2022-01-18 05:07:26,440 INFO L226 Difference]: Without dead ends: 821 [2022-01-18 05:07:26,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:26,440 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:26,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 337 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:07:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-18 05:07:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 471. [2022-01-18 05:07:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.008510638297872) internal successors, (1414), 470 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1414 transitions. [2022-01-18 05:07:26,447 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1414 transitions. Word has length 22 [2022-01-18 05:07:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:26,447 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1414 transitions. [2022-01-18 05:07:26,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1414 transitions. [2022-01-18 05:07:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:26,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:26,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:26,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:26,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:26,648 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 287556811, now seen corresponding path program 92 times [2022-01-18 05:07:26,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:26,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909559422] [2022-01-18 05:07:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:26,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:26,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:26,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909559422] [2022-01-18 05:07:26,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909559422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:26,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627641747] [2022-01-18 05:07:26,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:26,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:26,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:26,728 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) [2022-01-18 05:07:26,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 05:07:26,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:26,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:26,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:26,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:27,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:27,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:27,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:27,284 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:27,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:27,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:27,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627641747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:27,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:27,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:27,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677805356] [2022-01-18 05:07:27,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:27,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:27,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:27,291 INFO L87 Difference]: Start difference. First operand 471 states and 1414 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:27,709 INFO L93 Difference]: Finished difference Result 697 states and 2056 transitions. [2022-01-18 05:07:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:07:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:27,710 INFO L225 Difference]: With dead ends: 697 [2022-01-18 05:07:27,710 INFO L226 Difference]: Without dead ends: 697 [2022-01-18 05:07:27,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:07:27,711 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 133 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:27,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 233 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-01-18 05:07:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 480. [2022-01-18 05:07:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.020876826722338) internal successors, (1447), 479 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1447 transitions. [2022-01-18 05:07:27,716 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1447 transitions. Word has length 22 [2022-01-18 05:07:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:27,717 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1447 transitions. [2022-01-18 05:07:27,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1447 transitions. [2022-01-18 05:07:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:27,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:27,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:27,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 05:07:27,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:27,918 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:27,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1782159775, now seen corresponding path program 93 times [2022-01-18 05:07:27,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:27,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115365996] [2022-01-18 05:07:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:27,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:27,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:27,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115365996] [2022-01-18 05:07:27,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115365996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:27,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132613075] [2022-01-18 05:07:27,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:27,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:27,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:27,991 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) [2022-01-18 05:07:27,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 05:07:28,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:28,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:28,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:28,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:07:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:28,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:28,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:28,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:28,509 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:28,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:28,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132613075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:28,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:28,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:28,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494955645] [2022-01-18 05:07:28,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:28,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:28,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:28,517 INFO L87 Difference]: Start difference. First operand 480 states and 1447 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:28,887 INFO L93 Difference]: Finished difference Result 719 states and 2116 transitions. [2022-01-18 05:07:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:28,889 INFO L225 Difference]: With dead ends: 719 [2022-01-18 05:07:28,889 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 05:07:28,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:28,889 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 162 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:28,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 167 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 05:07:28,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 477. [2022-01-18 05:07:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.014705882352941) internal successors, (1435), 476 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1435 transitions. [2022-01-18 05:07:28,895 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1435 transitions. Word has length 22 [2022-01-18 05:07:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:28,895 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1435 transitions. [2022-01-18 05:07:28,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1435 transitions. [2022-01-18 05:07:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:28,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:28,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:28,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:29,096 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,SelfDestructingSolverStorable109 [2022-01-18 05:07:29,096 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2087860311, now seen corresponding path program 94 times [2022-01-18 05:07:29,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:29,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309160214] [2022-01-18 05:07:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:29,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:29,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309160214] [2022-01-18 05:07:29,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309160214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416254358] [2022-01-18 05:07:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:29,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:29,178 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) [2022-01-18 05:07:29,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 05:07:29,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:29,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:29,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:29,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:29,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:29,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:29,713 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:29,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:29,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:29,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416254358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:29,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:29,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:29,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886947945] [2022-01-18 05:07:29,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:29,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:29,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:29,721 INFO L87 Difference]: Start difference. First operand 477 states and 1435 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:30,137 INFO L93 Difference]: Finished difference Result 682 states and 2027 transitions. [2022-01-18 05:07:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:30,139 INFO L225 Difference]: With dead ends: 682 [2022-01-18 05:07:30,139 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 05:07:30,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:30,139 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:30,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 253 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 05:07:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 474. [2022-01-18 05:07:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.0084566596194504) internal successors, (1423), 473 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1423 transitions. [2022-01-18 05:07:30,144 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1423 transitions. Word has length 22 [2022-01-18 05:07:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:30,145 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1423 transitions. [2022-01-18 05:07:30,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1423 transitions. [2022-01-18 05:07:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:30,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:30,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:30,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 05:07:30,345 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,SelfDestructingSolverStorable110 [2022-01-18 05:07:30,346 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1926938889, now seen corresponding path program 95 times [2022-01-18 05:07:30,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:30,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285307042] [2022-01-18 05:07:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:30,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:30,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285307042] [2022-01-18 05:07:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285307042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685382697] [2022-01-18 05:07:30,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:30,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:30,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:30,425 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) [2022-01-18 05:07:30,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 05:07:30,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:30,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:30,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:30,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:30,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:30,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 05:07:30,920 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:30,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:30,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:30,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685382697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:30,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:30,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:30,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400582137] [2022-01-18 05:07:30,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:30,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:30,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:30,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:30,928 INFO L87 Difference]: Start difference. First operand 474 states and 1423 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:31,366 INFO L93 Difference]: Finished difference Result 768 states and 2261 transitions. [2022-01-18 05:07:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:31,367 INFO L225 Difference]: With dead ends: 768 [2022-01-18 05:07:31,367 INFO L226 Difference]: Without dead ends: 768 [2022-01-18 05:07:31,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:07:31,367 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:31,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 244 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-18 05:07:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 486. [2022-01-18 05:07:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0391752577319586) internal successors, (1474), 485 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1474 transitions. [2022-01-18 05:07:31,376 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1474 transitions. Word has length 22 [2022-01-18 05:07:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:31,376 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1474 transitions. [2022-01-18 05:07:31,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1474 transitions. [2022-01-18 05:07:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:31,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:31,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:31,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:31,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 05:07:31,591 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:31,591 INFO L85 PathProgramCache]: Analyzing trace with hash -432335925, now seen corresponding path program 96 times [2022-01-18 05:07:31,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845894859] [2022-01-18 05:07:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:31,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:31,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845894859] [2022-01-18 05:07:31,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845894859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:31,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630864980] [2022-01-18 05:07:31,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:31,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:31,669 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) [2022-01-18 05:07:31,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 05:07:31,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:31,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:31,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:32,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:32,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:07:32,177 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:32,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:32,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:32,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630864980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:32,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:32,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:32,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921205887] [2022-01-18 05:07:32,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:32,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:32,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:32,185 INFO L87 Difference]: Start difference. First operand 486 states and 1474 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:32,545 INFO L93 Difference]: Finished difference Result 735 states and 2168 transitions. [2022-01-18 05:07:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:32,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:32,546 INFO L225 Difference]: With dead ends: 735 [2022-01-18 05:07:32,546 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 05:07:32,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:07:32,546 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:32,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 225 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 05:07:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 493. [2022-01-18 05:07:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.024390243902439) internal successors, (1488), 492 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1488 transitions. [2022-01-18 05:07:32,553 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1488 transitions. Word has length 22 [2022-01-18 05:07:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:32,553 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1488 transitions. [2022-01-18 05:07:32,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1488 transitions. [2022-01-18 05:07:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:32,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:32,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:32,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 05:07:32,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:32,776 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -751448245, now seen corresponding path program 97 times [2022-01-18 05:07:32,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:32,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042377880] [2022-01-18 05:07:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:32,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:32,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042377880] [2022-01-18 05:07:32,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042377880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698442731] [2022-01-18 05:07:32,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:32,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:32,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:32,858 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) [2022-01-18 05:07:32,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 05:07:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:32,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:33,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:33,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:33,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:07:33,394 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:33,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:33,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:33,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698442731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:33,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:33,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:33,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916989370] [2022-01-18 05:07:33,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:33,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:33,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:33,402 INFO L87 Difference]: Start difference. First operand 493 states and 1488 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:33,726 INFO L93 Difference]: Finished difference Result 662 states and 1974 transitions. [2022-01-18 05:07:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:33,727 INFO L225 Difference]: With dead ends: 662 [2022-01-18 05:07:33,727 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 05:07:33,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:33,727 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:33,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 208 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 05:07:33,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 468. [2022-01-18 05:07:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.0085653104925054) internal successors, (1405), 467 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1405 transitions. [2022-01-18 05:07:33,733 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1405 transitions. Word has length 22 [2022-01-18 05:07:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:33,733 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1405 transitions. [2022-01-18 05:07:33,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:33,734 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1405 transitions. [2022-01-18 05:07:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:33,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:33,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:33,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 05:07:33,934 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,SelfDestructingSolverStorable113 [2022-01-18 05:07:33,935 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash -385697089, now seen corresponding path program 98 times [2022-01-18 05:07:33,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:33,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163418969] [2022-01-18 05:07:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:33,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:34,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:34,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163418969] [2022-01-18 05:07:34,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163418969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:34,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385355333] [2022-01-18 05:07:34,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:34,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:34,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:34,015 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) [2022-01-18 05:07:34,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 05:07:34,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:34,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:34,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:34,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:34,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:34,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:34,499 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:34,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:34,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:34,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385355333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:34,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:34,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 05:07:34,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725205742] [2022-01-18 05:07:34,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:07:34,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:07:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:07:34,506 INFO L87 Difference]: Start difference. First operand 468 states and 1405 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:34,923 INFO L93 Difference]: Finished difference Result 1068 states and 3171 transitions. [2022-01-18 05:07:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:34,926 INFO L225 Difference]: With dead ends: 1068 [2022-01-18 05:07:34,926 INFO L226 Difference]: Without dead ends: 1068 [2022-01-18 05:07:34,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:34,926 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 187 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:34,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 198 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-01-18 05:07:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 476. [2022-01-18 05:07:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0168421052631578) internal successors, (1433), 475 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1433 transitions. [2022-01-18 05:07:34,934 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1433 transitions. Word has length 22 [2022-01-18 05:07:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:34,934 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1433 transitions. [2022-01-18 05:07:34,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1433 transitions. [2022-01-18 05:07:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:34,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:34,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:34,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 05:07:35,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 05:07:35,136 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1673824613, now seen corresponding path program 99 times [2022-01-18 05:07:35,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:35,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875319362] [2022-01-18 05:07:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:35,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:35,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:35,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875319362] [2022-01-18 05:07:35,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875319362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314065139] [2022-01-18 05:07:35,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:35,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:35,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:35,221 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) [2022-01-18 05:07:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 05:07:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:07:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:35,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:07:35,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 05:07:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:07:35,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:35,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 275 [2022-01-18 05:07:35,990 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:35,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:35,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:07:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:07:35,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314065139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:35,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:35,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-01-18 05:07:35,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937132670] [2022-01-18 05:07:35,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:35,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:07:35,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:07:35,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:07:35,997 INFO L87 Difference]: Start difference. First operand 476 states and 1433 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2022-01-18 05:07:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:36,821 INFO L93 Difference]: Finished difference Result 1327 states and 3864 transitions. [2022-01-18 05:07:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:07:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 22 [2022-01-18 05:07:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:36,823 INFO L225 Difference]: With dead ends: 1327 [2022-01-18 05:07:36,823 INFO L226 Difference]: Without dead ends: 1204 [2022-01-18 05:07:36,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:07:36,824 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 198 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:36,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 341 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:07:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-01-18 05:07:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 452. [2022-01-18 05:07:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.008869179600887) internal successors, (1357), 451 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) [2022-01-18 05:07:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1357 transitions. [2022-01-18 05:07:36,831 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1357 transitions. Word has length 22 [2022-01-18 05:07:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:36,831 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1357 transitions. [2022-01-18 05:07:36,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2022-01-18 05:07:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1357 transitions. [2022-01-18 05:07:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:36,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:36,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:36,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 05:07:37,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:37,047 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2067370929, now seen corresponding path program 100 times [2022-01-18 05:07:37,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:37,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868290960] [2022-01-18 05:07:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:37,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:37,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868290960] [2022-01-18 05:07:37,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868290960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808901504] [2022-01-18 05:07:37,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:37,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:37,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:37,139 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) [2022-01-18 05:07:37,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 05:07:37,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:37,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:37,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:37,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:37,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:37,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:37,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:37,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:37,648 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:37,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:37,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:37,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808901504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:37,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:37,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:07:37,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332045523] [2022-01-18 05:07:37,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:37,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:37,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:37,655 INFO L87 Difference]: Start difference. First operand 452 states and 1357 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:38,259 INFO L93 Difference]: Finished difference Result 995 states and 2877 transitions. [2022-01-18 05:07:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:07:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:38,261 INFO L225 Difference]: With dead ends: 995 [2022-01-18 05:07:38,261 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 05:07:38,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:07:38,261 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 264 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:38,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 249 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 05:07:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 457. [2022-01-18 05:07:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.008771929824561) internal successors, (1372), 456 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1372 transitions. [2022-01-18 05:07:38,271 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1372 transitions. Word has length 22 [2022-01-18 05:07:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:38,271 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1372 transitions. [2022-01-18 05:07:38,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1372 transitions. [2022-01-18 05:07:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:38,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:38,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:38,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 05:07:38,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:38,494 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1697886599, now seen corresponding path program 101 times [2022-01-18 05:07:38,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183392954] [2022-01-18 05:07:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:38,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:38,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183392954] [2022-01-18 05:07:38,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183392954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319779050] [2022-01-18 05:07:38,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:38,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:38,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:38,574 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) [2022-01-18 05:07:38,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 05:07:38,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:07:38,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:38,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:38,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:38,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:38,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:39,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:39,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:39,076 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:39,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:39,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:39,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319779050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:39,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:39,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:07:39,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407797592] [2022-01-18 05:07:39,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:39,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:39,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:39,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:39,084 INFO L87 Difference]: Start difference. First operand 457 states and 1372 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:39,534 INFO L93 Difference]: Finished difference Result 916 states and 2676 transitions. [2022-01-18 05:07:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:39,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:39,535 INFO L225 Difference]: With dead ends: 916 [2022-01-18 05:07:39,535 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 05:07:39,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:39,536 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 192 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:39,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 219 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 05:07:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 475. [2022-01-18 05:07:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.021097046413502) internal successors, (1432), 474 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1432 transitions. [2022-01-18 05:07:39,542 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1432 transitions. Word has length 22 [2022-01-18 05:07:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:39,542 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1432 transitions. [2022-01-18 05:07:39,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1432 transitions. [2022-01-18 05:07:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:39,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:39,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:39,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 05:07:39,743 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,SelfDestructingSolverStorable117 [2022-01-18 05:07:39,743 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1479625607, now seen corresponding path program 102 times [2022-01-18 05:07:39,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:39,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070420378] [2022-01-18 05:07:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:39,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:39,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:39,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070420378] [2022-01-18 05:07:39,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070420378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:39,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528677571] [2022-01-18 05:07:39,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:39,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:39,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:39,852 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) [2022-01-18 05:07:39,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 05:07:39,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:40,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:40,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:40,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:40,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:40,542 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:40,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:40,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:40,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528677571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:40,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:40,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:07:40,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580312630] [2022-01-18 05:07:40,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:40,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:40,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:40,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:40,550 INFO L87 Difference]: Start difference. First operand 475 states and 1432 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:40,939 INFO L93 Difference]: Finished difference Result 833 states and 2457 transitions. [2022-01-18 05:07:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:40,940 INFO L225 Difference]: With dead ends: 833 [2022-01-18 05:07:40,940 INFO L226 Difference]: Without dead ends: 833 [2022-01-18 05:07:40,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:40,941 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:40,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 174 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-18 05:07:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 457. [2022-01-18 05:07:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.008771929824561) internal successors, (1372), 456 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1372 transitions. [2022-01-18 05:07:40,947 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1372 transitions. Word has length 22 [2022-01-18 05:07:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:40,947 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1372 transitions. [2022-01-18 05:07:40,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1372 transitions. [2022-01-18 05:07:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:40,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:40,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:40,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:41,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:41,148 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -553534529, now seen corresponding path program 103 times [2022-01-18 05:07:41,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699808436] [2022-01-18 05:07:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:41,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:41,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699808436] [2022-01-18 05:07:41,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699808436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029816143] [2022-01-18 05:07:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:41,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:41,239 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) [2022-01-18 05:07:41,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 05:07:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:41,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:41,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:41,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:41,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:07:41,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:07:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:41,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:41,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:41,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:41,857 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:41,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:41,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:41,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029816143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:41,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:41,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:41,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781697655] [2022-01-18 05:07:41,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:41,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:41,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:41,864 INFO L87 Difference]: Start difference. First operand 457 states and 1372 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:42,451 INFO L93 Difference]: Finished difference Result 985 states and 2899 transitions. [2022-01-18 05:07:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:07:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:42,453 INFO L225 Difference]: With dead ends: 985 [2022-01-18 05:07:42,453 INFO L226 Difference]: Without dead ends: 985 [2022-01-18 05:07:42,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:07:42,453 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 214 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:42,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 248 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-18 05:07:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 471. [2022-01-18 05:07:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0531914893617023) internal successors, (1435), 470 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1435 transitions. [2022-01-18 05:07:42,460 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1435 transitions. Word has length 22 [2022-01-18 05:07:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:42,460 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1435 transitions. [2022-01-18 05:07:42,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1435 transitions. [2022-01-18 05:07:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:42,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:42,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:42,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 05:07:42,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:42,661 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash 941068435, now seen corresponding path program 104 times [2022-01-18 05:07:42,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:42,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498949592] [2022-01-18 05:07:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:42,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:42,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:42,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498949592] [2022-01-18 05:07:42,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498949592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:42,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504036118] [2022-01-18 05:07:42,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:42,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:42,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:42,751 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) [2022-01-18 05:07:42,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 05:07:42,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:42,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:42,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:43,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:07:43,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:07:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:43,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:43,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:43,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:43,388 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:43,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:43,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:43,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504036118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:43,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:43,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:07:43,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536887358] [2022-01-18 05:07:43,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:43,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:43,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:43,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:43,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:43,395 INFO L87 Difference]: Start difference. First operand 471 states and 1435 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:43,871 INFO L93 Difference]: Finished difference Result 1001 states and 2934 transitions. [2022-01-18 05:07:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:43,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:43,873 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 05:07:43,873 INFO L226 Difference]: Without dead ends: 991 [2022-01-18 05:07:43,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:07:43,874 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 253 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:43,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 180 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-01-18 05:07:43,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 478. [2022-01-18 05:07:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.0377358490566038) internal successors, (1449), 477 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1449 transitions. [2022-01-18 05:07:43,880 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1449 transitions. Word has length 22 [2022-01-18 05:07:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:43,881 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1449 transitions. [2022-01-18 05:07:43,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1449 transitions. [2022-01-18 05:07:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:43,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:43,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:44,081 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,SelfDestructingSolverStorable120 [2022-01-18 05:07:44,082 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1982143627, now seen corresponding path program 105 times [2022-01-18 05:07:44,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:44,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282626572] [2022-01-18 05:07:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:44,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:44,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:44,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282626572] [2022-01-18 05:07:44,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282626572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:44,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432740557] [2022-01-18 05:07:44,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:44,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:44,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:44,187 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) [2022-01-18 05:07:44,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 05:07:44,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:07:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:44,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:44,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-01-18 05:07:44,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-18 05:07:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:44,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:44,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:44,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:44,859 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:44,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:44,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:44,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432740557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:44,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:44,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:44,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998949085] [2022-01-18 05:07:44,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:44,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:44,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:44,866 INFO L87 Difference]: Start difference. First operand 478 states and 1449 transitions. Second operand has 23 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) [2022-01-18 05:07:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:45,591 INFO L93 Difference]: Finished difference Result 1072 states and 3124 transitions. [2022-01-18 05:07:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:07:45,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:07:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:45,593 INFO L225 Difference]: With dead ends: 1072 [2022-01-18 05:07:45,593 INFO L226 Difference]: Without dead ends: 1072 [2022-01-18 05:07:45,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:07:45,593 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 363 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:45,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 222 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-18 05:07:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 476. [2022-01-18 05:07:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.031578947368421) internal successors, (1440), 475 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1440 transitions. [2022-01-18 05:07:45,600 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1440 transitions. Word has length 22 [2022-01-18 05:07:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:45,600 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1440 transitions. [2022-01-18 05:07:45,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:07:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1440 transitions. [2022-01-18 05:07:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:45,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:45,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:45,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 05:07:45,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:45,802 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash -94685677, now seen corresponding path program 106 times [2022-01-18 05:07:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110552720] [2022-01-18 05:07:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:45,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:45,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110552720] [2022-01-18 05:07:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110552720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501336578] [2022-01-18 05:07:45,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:45,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:45,886 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) [2022-01-18 05:07:45,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 05:07:46,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:46,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:46,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:46,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:46,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:46,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:07:46,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:07:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:46,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:46,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:46,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:46,500 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:46,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:46,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:46,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501336578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:46,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:46,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:07:46,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203301175] [2022-01-18 05:07:46,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:46,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:46,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:46,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:46,507 INFO L87 Difference]: Start difference. First operand 476 states and 1440 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:47,037 INFO L93 Difference]: Finished difference Result 1026 states and 3004 transitions. [2022-01-18 05:07:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:47,038 INFO L225 Difference]: With dead ends: 1026 [2022-01-18 05:07:47,038 INFO L226 Difference]: Without dead ends: 1017 [2022-01-18 05:07:47,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:07:47,039 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 159 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:47,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 231 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-18 05:07:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 490. [2022-01-18 05:07:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.042944785276074) internal successors, (1488), 489 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1488 transitions. [2022-01-18 05:07:47,045 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1488 transitions. Word has length 22 [2022-01-18 05:07:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:47,046 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1488 transitions. [2022-01-18 05:07:47,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1488 transitions. [2022-01-18 05:07:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:47,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:47,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:47,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 05:07:47,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 05:07:47,247 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:47,247 INFO L85 PathProgramCache]: Analyzing trace with hash 247563817, now seen corresponding path program 107 times [2022-01-18 05:07:47,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:47,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758604325] [2022-01-18 05:07:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:47,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:47,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758604325] [2022-01-18 05:07:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758604325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344050756] [2022-01-18 05:07:47,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:47,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:47,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:47,337 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) [2022-01-18 05:07:47,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 05:07:47,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:07:47,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:47,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:47,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:47,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:47,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:07:47,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:07:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:47,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:47,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:47,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:47,903 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:47,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:47,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:47,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344050756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:47,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:47,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:07:47,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902778049] [2022-01-18 05:07:47,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:47,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:47,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:47,912 INFO L87 Difference]: Start difference. First operand 490 states and 1488 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:07:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:48,465 INFO L93 Difference]: Finished difference Result 1068 states and 3088 transitions. [2022-01-18 05:07:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:07:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:48,466 INFO L225 Difference]: With dead ends: 1068 [2022-01-18 05:07:48,467 INFO L226 Difference]: Without dead ends: 1058 [2022-01-18 05:07:48,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:48,467 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 182 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:48,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 238 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-18 05:07:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 502. [2022-01-18 05:07:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.0459081836327346) internal successors, (1526), 501 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1526 transitions. [2022-01-18 05:07:48,474 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1526 transitions. Word has length 22 [2022-01-18 05:07:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:48,474 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1526 transitions. [2022-01-18 05:07:48,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:07:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1526 transitions. [2022-01-18 05:07:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:48,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:48,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:48,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 05:07:48,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:48,675 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1333208099, now seen corresponding path program 108 times [2022-01-18 05:07:48,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:48,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703600686] [2022-01-18 05:07:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:48,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:48,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703600686] [2022-01-18 05:07:48,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703600686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573198554] [2022-01-18 05:07:48,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:48,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:48,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:48,759 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) [2022-01-18 05:07:48,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 05:07:48,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:07:48,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:48,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:49,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-01-18 05:07:49,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-18 05:07:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:49,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:49,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:49,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:49,333 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:49,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:49,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:49,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573198554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:49,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:49,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:07:49,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302306215] [2022-01-18 05:07:49,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:49,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:49,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:49,340 INFO L87 Difference]: Start difference. First operand 502 states and 1526 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:07:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:49,832 INFO L93 Difference]: Finished difference Result 1015 states and 2951 transitions. [2022-01-18 05:07:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:07:49,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:07:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:49,834 INFO L225 Difference]: With dead ends: 1015 [2022-01-18 05:07:49,834 INFO L226 Difference]: Without dead ends: 1003 [2022-01-18 05:07:49,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:49,835 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:49,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 211 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-18 05:07:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 498. [2022-01-18 05:07:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.046277665995976) internal successors, (1514), 497 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1514 transitions. [2022-01-18 05:07:49,841 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1514 transitions. Word has length 22 [2022-01-18 05:07:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:49,842 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1514 transitions. [2022-01-18 05:07:49,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:07:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1514 transitions. [2022-01-18 05:07:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:49,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:49,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:49,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 05:07:50,042 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,SelfDestructingSolverStorable124 [2022-01-18 05:07:50,043 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1614312619, now seen corresponding path program 109 times [2022-01-18 05:07:50,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:50,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674737181] [2022-01-18 05:07:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:50,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:50,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:50,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674737181] [2022-01-18 05:07:50,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674737181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:50,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323138887] [2022-01-18 05:07:50,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:50,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:50,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:50,135 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) [2022-01-18 05:07:50,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 05:07:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:50,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:50,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:50,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:50,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-01-18 05:07:50,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 05:07:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:50,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:50,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:50,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:50,779 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:50,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:50,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:50,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323138887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:50,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:50,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:50,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039366174] [2022-01-18 05:07:50,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:50,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:50,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:50,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:50,787 INFO L87 Difference]: Start difference. First operand 498 states and 1514 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:51,365 INFO L93 Difference]: Finished difference Result 941 states and 2770 transitions. [2022-01-18 05:07:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:51,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:51,366 INFO L225 Difference]: With dead ends: 941 [2022-01-18 05:07:51,366 INFO L226 Difference]: Without dead ends: 941 [2022-01-18 05:07:51,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:07:51,366 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 179 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:51,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 268 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-18 05:07:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 503. [2022-01-18 05:07:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.041832669322709) internal successors, (1527), 502 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1527 transitions. [2022-01-18 05:07:51,373 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1527 transitions. Word has length 22 [2022-01-18 05:07:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:51,373 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1527 transitions. [2022-01-18 05:07:51,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1527 transitions. [2022-01-18 05:07:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:51,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:51,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:51,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:51,574 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,SelfDestructingSolverStorable125 [2022-01-18 05:07:51,575 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:51,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash -119709655, now seen corresponding path program 110 times [2022-01-18 05:07:51,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:51,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262307968] [2022-01-18 05:07:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:51,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:51,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:51,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262307968] [2022-01-18 05:07:51,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262307968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:51,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135237015] [2022-01-18 05:07:51,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:51,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:51,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:51,661 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) [2022-01-18 05:07:51,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 05:07:51,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:51,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:51,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:51,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:51,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:52,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-01-18 05:07:52,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 05:07:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:52,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:52,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:52,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:52,276 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:52,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:52,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:52,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135237015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:52,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:52,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:07:52,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395914221] [2022-01-18 05:07:52,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:52,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:52,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:52,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:52,283 INFO L87 Difference]: Start difference. First operand 503 states and 1527 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:52,733 INFO L93 Difference]: Finished difference Result 914 states and 2707 transitions. [2022-01-18 05:07:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:52,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:52,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:52,734 INFO L225 Difference]: With dead ends: 914 [2022-01-18 05:07:52,734 INFO L226 Difference]: Without dead ends: 904 [2022-01-18 05:07:52,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:52,735 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 168 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:52,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 227 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-18 05:07:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 482. [2022-01-18 05:07:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0228690228690227) internal successors, (1454), 481 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1454 transitions. [2022-01-18 05:07:52,741 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1454 transitions. Word has length 22 [2022-01-18 05:07:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:52,741 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1454 transitions. [2022-01-18 05:07:52,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1454 transitions. [2022-01-18 05:07:52,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:52,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:52,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:52,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 05:07:52,944 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,SelfDestructingSolverStorable126 [2022-01-18 05:07:52,944 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -645629941, now seen corresponding path program 111 times [2022-01-18 05:07:52,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:52,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106877168] [2022-01-18 05:07:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:52,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:53,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106877168] [2022-01-18 05:07:53,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106877168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:53,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392746811] [2022-01-18 05:07:53,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:53,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:53,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:53,041 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) [2022-01-18 05:07:53,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 05:07:53,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:53,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:53,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:53,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:53,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:53,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:53,649 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:53,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:53,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:53,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392746811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:53,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:53,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:53,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415961998] [2022-01-18 05:07:53,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:53,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:53,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:53,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:53,657 INFO L87 Difference]: Start difference. First operand 482 states and 1454 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:54,061 INFO L93 Difference]: Finished difference Result 846 states and 2523 transitions. [2022-01-18 05:07:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:54,063 INFO L225 Difference]: With dead ends: 846 [2022-01-18 05:07:54,063 INFO L226 Difference]: Without dead ends: 846 [2022-01-18 05:07:54,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:54,064 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 117 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:54,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 204 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-01-18 05:07:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 479. [2022-01-18 05:07:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0230125523012554) internal successors, (1445), 478 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1445 transitions. [2022-01-18 05:07:54,071 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1445 transitions. Word has length 22 [2022-01-18 05:07:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:54,071 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1445 transitions. [2022-01-18 05:07:54,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1445 transitions. [2022-01-18 05:07:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:54,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:54,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:54,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:54,274 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,SelfDestructingSolverStorable127 [2022-01-18 05:07:54,274 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash -139412553, now seen corresponding path program 112 times [2022-01-18 05:07:54,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:54,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594886120] [2022-01-18 05:07:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:54,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:54,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:54,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594886120] [2022-01-18 05:07:54,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594886120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:54,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836531940] [2022-01-18 05:07:54,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:54,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:54,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:54,378 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) [2022-01-18 05:07:54,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 05:07:54,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:54,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:54,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:54,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:54,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:54,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:54,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:54,993 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:54,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:54,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:55,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836531940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:55,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:55,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:55,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699734710] [2022-01-18 05:07:55,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:55,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:55,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:55,001 INFO L87 Difference]: Start difference. First operand 479 states and 1445 transitions. Second operand has 22 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) [2022-01-18 05:07:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:55,579 INFO L93 Difference]: Finished difference Result 907 states and 2653 transitions. [2022-01-18 05:07:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:07:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 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 22 [2022-01-18 05:07:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:55,581 INFO L225 Difference]: With dead ends: 907 [2022-01-18 05:07:55,581 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 05:07:55,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:07:55,581 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 200 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:55,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 252 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 05:07:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 479. [2022-01-18 05:07:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0230125523012554) internal successors, (1445), 478 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1445 transitions. [2022-01-18 05:07:55,588 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1445 transitions. Word has length 22 [2022-01-18 05:07:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:55,588 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1445 transitions. [2022-01-18 05:07:55,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 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) [2022-01-18 05:07:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1445 transitions. [2022-01-18 05:07:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:55,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:55,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:55,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 05:07:55,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:55,789 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:55,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2078725439, now seen corresponding path program 113 times [2022-01-18 05:07:55,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:55,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901289329] [2022-01-18 05:07:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:55,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:55,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901289329] [2022-01-18 05:07:55,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901289329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697650433] [2022-01-18 05:07:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:55,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:55,892 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) [2022-01-18 05:07:55,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 05:07:56,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:07:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:56,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:56,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:56,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:07:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:56,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:56,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:56,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:56,506 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:56,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:56,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:56,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697650433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:56,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:56,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:56,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834561976] [2022-01-18 05:07:56,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:56,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:56,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:56,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:56,513 INFO L87 Difference]: Start difference. First operand 479 states and 1445 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:56,886 INFO L93 Difference]: Finished difference Result 894 states and 2624 transitions. [2022-01-18 05:07:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:56,887 INFO L225 Difference]: With dead ends: 894 [2022-01-18 05:07:56,887 INFO L226 Difference]: Without dead ends: 885 [2022-01-18 05:07:56,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:56,888 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:56,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 165 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-18 05:07:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 487. [2022-01-18 05:07:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.0102880658436213) internal successors, (1463), 486 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1463 transitions. [2022-01-18 05:07:56,894 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1463 transitions. Word has length 22 [2022-01-18 05:07:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:56,894 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1463 transitions. [2022-01-18 05:07:56,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1463 transitions. [2022-01-18 05:07:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:56,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:56,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:56,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 05:07:57,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:57,095 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2043126113, now seen corresponding path program 114 times [2022-01-18 05:07:57,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:57,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198770157] [2022-01-18 05:07:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:57,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:57,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198770157] [2022-01-18 05:07:57,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198770157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476740267] [2022-01-18 05:07:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:57,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:57,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:57,199 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) [2022-01-18 05:07:57,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 05:07:57,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:57,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:57,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:07:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:57,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:57,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:57,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:07:57,791 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:57,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:57,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:57,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476740267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:57,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:57,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:07:57,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77270171] [2022-01-18 05:07:57,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:57,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:57,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:57,799 INFO L87 Difference]: Start difference. First operand 487 states and 1463 transitions. Second operand has 22 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) [2022-01-18 05:07:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:58,227 INFO L93 Difference]: Finished difference Result 817 states and 2433 transitions. [2022-01-18 05:07:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:07:58,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 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 22 [2022-01-18 05:07:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:58,228 INFO L225 Difference]: With dead ends: 817 [2022-01-18 05:07:58,228 INFO L226 Difference]: Without dead ends: 817 [2022-01-18 05:07:58,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:07:58,229 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:58,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 223 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:07:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-18 05:07:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 457. [2022-01-18 05:07:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.008771929824561) internal successors, (1372), 456 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1372 transitions. [2022-01-18 05:07:58,235 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1372 transitions. Word has length 22 [2022-01-18 05:07:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:58,235 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1372 transitions. [2022-01-18 05:07:58,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 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) [2022-01-18 05:07:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1372 transitions. [2022-01-18 05:07:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:58,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:58,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:58,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:58,451 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash -41099855, now seen corresponding path program 115 times [2022-01-18 05:07:58,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064643974] [2022-01-18 05:07:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:58,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:58,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064643974] [2022-01-18 05:07:58,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064643974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441109131] [2022-01-18 05:07:58,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:58,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:58,533 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) [2022-01-18 05:07:58,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 05:07:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:07:58,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:58,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:07:58,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:07:58,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 05:07:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:59,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:59,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:59,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:07:59,280 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:07:59,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:07:59,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:07:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:59,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441109131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:59,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:59,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:07:59,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478527055] [2022-01-18 05:07:59,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:59,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:07:59,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:07:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:07:59,288 INFO L87 Difference]: Start difference. First operand 457 states and 1372 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:59,632 INFO L93 Difference]: Finished difference Result 664 states and 1956 transitions. [2022-01-18 05:07:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:07:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:07:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:59,634 INFO L225 Difference]: With dead ends: 664 [2022-01-18 05:07:59,634 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 05:07:59,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:07:59,634 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 180 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:07:59,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 188 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:07:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 05:07:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 467. [2022-01-18 05:07:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0300429184549356) internal successors, (1412), 466 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1412 transitions. [2022-01-18 05:07:59,639 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1412 transitions. Word has length 22 [2022-01-18 05:07:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:59,640 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1412 transitions. [2022-01-18 05:07:59,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:07:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1412 transitions. [2022-01-18 05:07:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:07:59,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:59,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:59,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 05:07:59,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:59,841 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1453503109, now seen corresponding path program 116 times [2022-01-18 05:07:59,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:59,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822842920] [2022-01-18 05:07:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:59,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:59,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822842920] [2022-01-18 05:07:59,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822842920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686619917] [2022-01-18 05:07:59,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:59,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:59,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:59,929 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) [2022-01-18 05:07:59,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 05:08:00,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:00,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:00,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:00,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:08:00,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 05:08:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:00,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:00,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:00,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:00,619 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:00,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:00,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:00,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686619917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:00,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:00,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:00,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783945141] [2022-01-18 05:08:00,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:00,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:00,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:00,626 INFO L87 Difference]: Start difference. First operand 467 states and 1412 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:01,064 INFO L93 Difference]: Finished difference Result 689 states and 2025 transitions. [2022-01-18 05:08:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:01,065 INFO L225 Difference]: With dead ends: 689 [2022-01-18 05:08:01,065 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 05:08:01,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:08:01,065 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 167 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:01,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 232 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 05:08:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 464. [2022-01-18 05:08:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.023758099352052) internal successors, (1400), 463 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1400 transitions. [2022-01-18 05:08:01,071 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1400 transitions. Word has length 22 [2022-01-18 05:08:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:01,071 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1400 transitions. [2022-01-18 05:08:01,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1400 transitions. [2022-01-18 05:08:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:01,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:01,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:01,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 05:08:01,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:01,272 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1878450319, now seen corresponding path program 117 times [2022-01-18 05:08:01,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056575649] [2022-01-18 05:08:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:01,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:01,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056575649] [2022-01-18 05:08:01,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056575649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344491494] [2022-01-18 05:08:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:01,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:01,347 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) [2022-01-18 05:08:01,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 05:08:01,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:01,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:01,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:01,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:01,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:01,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:01,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:02,006 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:02,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:02,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:02,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344491494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:02,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:02,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:02,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619041635] [2022-01-18 05:08:02,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:02,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:02,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:02,013 INFO L87 Difference]: Start difference. First operand 464 states and 1400 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:02,374 INFO L93 Difference]: Finished difference Result 662 states and 1962 transitions. [2022-01-18 05:08:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:02,375 INFO L225 Difference]: With dead ends: 662 [2022-01-18 05:08:02,375 INFO L226 Difference]: Without dead ends: 642 [2022-01-18 05:08:02,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:02,376 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:02,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 198 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-18 05:08:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 461. [2022-01-18 05:08:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.017391304347826) internal successors, (1388), 460 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1388 transitions. [2022-01-18 05:08:02,381 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1388 transitions. Word has length 22 [2022-01-18 05:08:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:02,381 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1388 transitions. [2022-01-18 05:08:02,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1388 transitions. [2022-01-18 05:08:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:02,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:02,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:02,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 05:08:02,582 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,SelfDestructingSolverStorable133 [2022-01-18 05:08:02,582 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1255511653, now seen corresponding path program 118 times [2022-01-18 05:08:02,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:02,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365118309] [2022-01-18 05:08:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:02,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:02,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365118309] [2022-01-18 05:08:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365118309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661657842] [2022-01-18 05:08:02,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:02,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:02,674 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) [2022-01-18 05:08:02,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 05:08:02,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:02,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:02,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:02,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:03,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:08:03,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:08:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:03,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:03,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:03,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:03,347 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:03,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:03,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:03,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661657842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:03,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:03,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:03,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67601071] [2022-01-18 05:08:03,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:03,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:03,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:03,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:03,355 INFO L87 Difference]: Start difference. First operand 461 states and 1388 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:03,791 INFO L93 Difference]: Finished difference Result 782 states and 2292 transitions. [2022-01-18 05:08:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:03,792 INFO L225 Difference]: With dead ends: 782 [2022-01-18 05:08:03,792 INFO L226 Difference]: Without dead ends: 782 [2022-01-18 05:08:03,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:08:03,793 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 187 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:03,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 241 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-18 05:08:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 471. [2022-01-18 05:08:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0531914893617023) internal successors, (1435), 470 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1435 transitions. [2022-01-18 05:08:03,799 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1435 transitions. Word has length 22 [2022-01-18 05:08:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:03,799 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1435 transitions. [2022-01-18 05:08:03,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1435 transitions. [2022-01-18 05:08:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:03,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:03,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:03,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:04,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 05:08:04,000 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1544852679, now seen corresponding path program 119 times [2022-01-18 05:08:04,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:04,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180343825] [2022-01-18 05:08:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:04,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:04,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:04,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180343825] [2022-01-18 05:08:04,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180343825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:04,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27142828] [2022-01-18 05:08:04,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:04,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:04,084 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) [2022-01-18 05:08:04,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 05:08:04,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:04,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:04,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:04,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:04,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:08:04,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:08:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:04,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:04,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:04,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:04,761 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:04,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:04,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:04,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27142828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:04,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:04,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:04,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357680995] [2022-01-18 05:08:04,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:04,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:04,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:04,769 INFO L87 Difference]: Start difference. First operand 471 states and 1435 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:05,240 INFO L93 Difference]: Finished difference Result 844 states and 2458 transitions. [2022-01-18 05:08:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:08:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:05,241 INFO L225 Difference]: With dead ends: 844 [2022-01-18 05:08:05,242 INFO L226 Difference]: Without dead ends: 834 [2022-01-18 05:08:05,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:08:05,242 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 192 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:05,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 215 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-18 05:08:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 478. [2022-01-18 05:08:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.0377358490566038) internal successors, (1449), 477 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1449 transitions. [2022-01-18 05:08:05,256 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1449 transitions. Word has length 22 [2022-01-18 05:08:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:05,256 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1449 transitions. [2022-01-18 05:08:05,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1449 transitions. [2022-01-18 05:08:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:05,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:05,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:05,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 05:08:05,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 05:08:05,458 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:05,459 INFO L85 PathProgramCache]: Analyzing trace with hash -503777487, now seen corresponding path program 120 times [2022-01-18 05:08:05,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:05,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012543871] [2022-01-18 05:08:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:05,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:05,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012543871] [2022-01-18 05:08:05,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012543871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880762653] [2022-01-18 05:08:05,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:05,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:05,552 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) [2022-01-18 05:08:05,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 05:08:05,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:05,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:05,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-01-18 05:08:05,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 05:08:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:06,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:06,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:06,231 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:06,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:06,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:06,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880762653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:06,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:06,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:06,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35228823] [2022-01-18 05:08:06,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:06,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:06,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:06,238 INFO L87 Difference]: Start difference. First operand 478 states and 1449 transitions. Second operand has 23 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) [2022-01-18 05:08:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:06,626 INFO L93 Difference]: Finished difference Result 790 states and 2287 transitions. [2022-01-18 05:08:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:06,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:08:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:06,627 INFO L225 Difference]: With dead ends: 790 [2022-01-18 05:08:06,627 INFO L226 Difference]: Without dead ends: 790 [2022-01-18 05:08:06,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:08:06,628 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 238 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:06,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 180 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-18 05:08:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 459. [2022-01-18 05:08:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.010917030567686) internal successors, (1379), 458 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1379 transitions. [2022-01-18 05:08:06,634 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1379 transitions. Word has length 22 [2022-01-18 05:08:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:06,634 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1379 transitions. [2022-01-18 05:08:06,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:08:06,634 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1379 transitions. [2022-01-18 05:08:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:06,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:06,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:06,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:06,835 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,SelfDestructingSolverStorable136 [2022-01-18 05:08:06,835 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1714360505, now seen corresponding path program 121 times [2022-01-18 05:08:06,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:06,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468201822] [2022-01-18 05:08:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:06,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:06,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468201822] [2022-01-18 05:08:06,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468201822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150169626] [2022-01-18 05:08:06,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:06,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:06,922 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) [2022-01-18 05:08:06,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 05:08:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:07,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:07,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 05:08:07,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:08:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:07,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:07,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:07,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:07,605 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:07,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:07,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150169626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:07,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:07,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:07,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134194856] [2022-01-18 05:08:07,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:07,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:07,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:07,612 INFO L87 Difference]: Start difference. First operand 459 states and 1379 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:08,004 INFO L93 Difference]: Finished difference Result 745 states and 2167 transitions. [2022-01-18 05:08:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:08,006 INFO L225 Difference]: With dead ends: 745 [2022-01-18 05:08:08,006 INFO L226 Difference]: Without dead ends: 736 [2022-01-18 05:08:08,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:08,006 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:08,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 240 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-01-18 05:08:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 475. [2022-01-18 05:08:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.029535864978903) internal successors, (1436), 474 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1436 transitions. [2022-01-18 05:08:08,012 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1436 transitions. Word has length 22 [2022-01-18 05:08:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:08,012 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1436 transitions. [2022-01-18 05:08:08,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1436 transitions. [2022-01-18 05:08:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:08,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:08,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:08,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 05:08:08,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:08,213 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2056609999, now seen corresponding path program 122 times [2022-01-18 05:08:08,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:08,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264621542] [2022-01-18 05:08:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:08,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:08,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264621542] [2022-01-18 05:08:08,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264621542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764876047] [2022-01-18 05:08:08,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:08,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:08,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:08,302 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) [2022-01-18 05:08:08,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 05:08:08,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:08,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:08,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:08:08,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:08:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:08,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:08,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:08,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:09,010 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:09,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:09,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:09,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764876047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:09,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:09,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:09,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649382274] [2022-01-18 05:08:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:09,017 INFO L87 Difference]: Start difference. First operand 475 states and 1436 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:09,562 INFO L93 Difference]: Finished difference Result 847 states and 2416 transitions. [2022-01-18 05:08:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:08:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:09,563 INFO L225 Difference]: With dead ends: 847 [2022-01-18 05:08:09,563 INFO L226 Difference]: Without dead ends: 837 [2022-01-18 05:08:09,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:08:09,564 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 238 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:09,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 215 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-18 05:08:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 497. [2022-01-18 05:08:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.024193548387097) internal successors, (1500), 496 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1500 transitions. [2022-01-18 05:08:09,570 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1500 transitions. Word has length 22 [2022-01-18 05:08:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:09,570 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1500 transitions. [2022-01-18 05:08:09,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1500 transitions. [2022-01-18 05:08:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:09,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:09,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:09,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 05:08:09,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:09,771 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash 475838083, now seen corresponding path program 123 times [2022-01-18 05:08:09,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:09,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019756908] [2022-01-18 05:08:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:09,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:09,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:09,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019756908] [2022-01-18 05:08:09,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019756908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:09,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272564246] [2022-01-18 05:08:09,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:09,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:09,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:09,849 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) [2022-01-18 05:08:09,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 05:08:09,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:08:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:10,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:10,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 05:08:10,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:08:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:10,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:10,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:10,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:10,554 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:10,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:10,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:10,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272564246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:10,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:10,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:10,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244117619] [2022-01-18 05:08:10,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:10,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:10,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:10,561 INFO L87 Difference]: Start difference. First operand 497 states and 1500 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:10,978 INFO L93 Difference]: Finished difference Result 804 states and 2305 transitions. [2022-01-18 05:08:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:08:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:10,979 INFO L225 Difference]: With dead ends: 804 [2022-01-18 05:08:10,979 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 05:08:10,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:10,980 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:10,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 222 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 05:08:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 477. [2022-01-18 05:08:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.0252100840336134) internal successors, (1440), 476 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1440 transitions. [2022-01-18 05:08:10,986 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1440 transitions. Word has length 22 [2022-01-18 05:08:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:10,986 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1440 transitions. [2022-01-18 05:08:10,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1440 transitions. [2022-01-18 05:08:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:10,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:10,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:11,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 05:08:11,187 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,SelfDestructingSolverStorable139 [2022-01-18 05:08:11,187 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1854643641, now seen corresponding path program 124 times [2022-01-18 05:08:11,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:11,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89785090] [2022-01-18 05:08:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:11,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:11,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89785090] [2022-01-18 05:08:11,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89785090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082321115] [2022-01-18 05:08:11,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:11,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:11,266 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) [2022-01-18 05:08:11,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 05:08:11,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:11,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:11,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:11,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:11,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:11,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:11,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:11,906 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:11,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:11,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:11,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082321115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:11,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:11,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:11,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623582237] [2022-01-18 05:08:11,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:11,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:11,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:11,913 INFO L87 Difference]: Start difference. First operand 477 states and 1440 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:12,240 INFO L93 Difference]: Finished difference Result 669 states and 1985 transitions. [2022-01-18 05:08:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:12,242 INFO L225 Difference]: With dead ends: 669 [2022-01-18 05:08:12,242 INFO L226 Difference]: Without dead ends: 649 [2022-01-18 05:08:12,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:12,242 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:12,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 151 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-18 05:08:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 483. [2022-01-18 05:08:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0145228215767634) internal successors, (1453), 482 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1453 transitions. [2022-01-18 05:08:12,248 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1453 transitions. Word has length 22 [2022-01-18 05:08:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:12,248 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1453 transitions. [2022-01-18 05:08:12,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1453 transitions. [2022-01-18 05:08:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:12,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:12,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:12,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:12,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:12,450 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 95354501, now seen corresponding path program 125 times [2022-01-18 05:08:12,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:12,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651654427] [2022-01-18 05:08:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:12,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:12,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651654427] [2022-01-18 05:08:12,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651654427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413149583] [2022-01-18 05:08:12,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:12,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:12,526 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) [2022-01-18 05:08:12,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 05:08:12,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:12,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:12,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:12,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:12,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-18 05:08:12,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-01-18 05:08:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:12,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:13,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:13,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:08:13,149 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:13,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:13,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:13,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413149583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:13,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:13,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:13,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222803092] [2022-01-18 05:08:13,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:13,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:13,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:13,157 INFO L87 Difference]: Start difference. First operand 483 states and 1453 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:13,665 INFO L93 Difference]: Finished difference Result 747 states and 2163 transitions. [2022-01-18 05:08:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:13,667 INFO L225 Difference]: With dead ends: 747 [2022-01-18 05:08:13,667 INFO L226 Difference]: Without dead ends: 737 [2022-01-18 05:08:13,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:08:13,667 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 165 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:13,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 255 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-18 05:08:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 505. [2022-01-18 05:08:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.009920634920635) internal successors, (1517), 504 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1517 transitions. [2022-01-18 05:08:13,673 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1517 transitions. Word has length 22 [2022-01-18 05:08:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:13,673 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1517 transitions. [2022-01-18 05:08:13,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1517 transitions. [2022-01-18 05:08:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:13,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:13,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:13,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 05:08:13,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:13,874 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1485417415, now seen corresponding path program 126 times [2022-01-18 05:08:13,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:13,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678667885] [2022-01-18 05:08:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:13,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:13,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678667885] [2022-01-18 05:08:13,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678667885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280013301] [2022-01-18 05:08:13,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:13,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:13,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:13,951 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) [2022-01-18 05:08:13,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 05:08:14,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:14,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:14,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:14,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-18 05:08:14,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-01-18 05:08:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:14,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:14,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:14,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:08:14,538 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:14,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:14,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:14,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280013301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:14,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:14,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:14,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196014538] [2022-01-18 05:08:14,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:14,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:14,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:14,545 INFO L87 Difference]: Start difference. First operand 505 states and 1517 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:14,940 INFO L93 Difference]: Finished difference Result 704 states and 2052 transitions. [2022-01-18 05:08:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:14,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:14,941 INFO L225 Difference]: With dead ends: 704 [2022-01-18 05:08:14,941 INFO L226 Difference]: Without dead ends: 689 [2022-01-18 05:08:14,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:08:14,942 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:14,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 232 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-18 05:08:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 479. [2022-01-18 05:08:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0209205020920504) internal successors, (1444), 478 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1444 transitions. [2022-01-18 05:08:14,947 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1444 transitions. Word has length 22 [2022-01-18 05:08:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:14,948 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1444 transitions. [2022-01-18 05:08:14,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1444 transitions. [2022-01-18 05:08:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:14,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:14,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:14,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 05:08:15,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:15,149 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1434517723, now seen corresponding path program 127 times [2022-01-18 05:08:15,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:15,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412907427] [2022-01-18 05:08:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:15,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:15,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412907427] [2022-01-18 05:08:15,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412907427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907598650] [2022-01-18 05:08:15,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:15,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:15,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:15,232 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) [2022-01-18 05:08:15,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 05:08:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:15,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:15,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:08:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:15,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:15,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:15,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:15,832 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:15,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:15,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:15,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907598650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:15,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:15,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:15,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21803858] [2022-01-18 05:08:15,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:15,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:15,840 INFO L87 Difference]: Start difference. First operand 479 states and 1444 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:16,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:16,134 INFO L93 Difference]: Finished difference Result 647 states and 1891 transitions. [2022-01-18 05:08:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:16,136 INFO L225 Difference]: With dead ends: 647 [2022-01-18 05:08:16,136 INFO L226 Difference]: Without dead ends: 647 [2022-01-18 05:08:16,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:16,136 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:16,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 179 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-18 05:08:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 482. [2022-01-18 05:08:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0103950103950106) internal successors, (1448), 481 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1448 transitions. [2022-01-18 05:08:16,142 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1448 transitions. Word has length 22 [2022-01-18 05:08:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:16,142 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1448 transitions. [2022-01-18 05:08:16,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1448 transitions. [2022-01-18 05:08:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:16,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:16,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:16,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:16,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:16,358 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:16,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1365846609, now seen corresponding path program 128 times [2022-01-18 05:08:16,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:16,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125577514] [2022-01-18 05:08:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:16,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:16,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125577514] [2022-01-18 05:08:16,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125577514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065228695] [2022-01-18 05:08:16,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:16,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:16,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:16,446 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) [2022-01-18 05:08:16,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 05:08:16,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:16,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:08:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:16,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:16,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:16,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:17,048 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:17,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:17,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:17,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065228695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:17,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:17,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:17,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18633101] [2022-01-18 05:08:17,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:17,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:17,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:17,056 INFO L87 Difference]: Start difference. First operand 482 states and 1448 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:17,438 INFO L93 Difference]: Finished difference Result 672 states and 1957 transitions. [2022-01-18 05:08:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:17,439 INFO L225 Difference]: With dead ends: 672 [2022-01-18 05:08:17,439 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 05:08:17,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:17,440 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:17,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 221 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 05:08:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 479. [2022-01-18 05:08:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.00418410041841) internal successors, (1436), 478 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1436 transitions. [2022-01-18 05:08:17,445 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1436 transitions. Word has length 22 [2022-01-18 05:08:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:17,445 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1436 transitions. [2022-01-18 05:08:17,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1436 transitions. [2022-01-18 05:08:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:17,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:17,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:17,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 05:08:17,646 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,SelfDestructingSolverStorable144 [2022-01-18 05:08:17,646 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash -940899399, now seen corresponding path program 129 times [2022-01-18 05:08:17,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:17,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007219692] [2022-01-18 05:08:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:17,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:17,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007219692] [2022-01-18 05:08:17,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007219692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294118757] [2022-01-18 05:08:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:17,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:17,732 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) [2022-01-18 05:08:17,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 05:08:17,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:17,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:17,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:17,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:18,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:18,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:18,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:18,388 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:18,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:18,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:18,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294118757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:18,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:18,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:18,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367645722] [2022-01-18 05:08:18,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:18,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:18,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:18,396 INFO L87 Difference]: Start difference. First operand 479 states and 1436 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:18,757 INFO L93 Difference]: Finished difference Result 635 states and 1880 transitions. [2022-01-18 05:08:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:18,759 INFO L225 Difference]: With dead ends: 635 [2022-01-18 05:08:18,759 INFO L226 Difference]: Without dead ends: 615 [2022-01-18 05:08:18,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:08:18,759 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:18,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 229 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-18 05:08:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 461. [2022-01-18 05:08:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.008695652173913) internal successors, (1384), 460 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1384 transitions. [2022-01-18 05:08:18,764 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1384 transitions. Word has length 22 [2022-01-18 05:08:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:18,764 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1384 transitions. [2022-01-18 05:08:18,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1384 transitions. [2022-01-18 05:08:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:18,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:18,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:18,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 05:08:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 05:08:18,967 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1398909669, now seen corresponding path program 130 times [2022-01-18 05:08:18,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081548063] [2022-01-18 05:08:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:18,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:19,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081548063] [2022-01-18 05:08:19,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081548063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250928303] [2022-01-18 05:08:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:19,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:19,053 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) [2022-01-18 05:08:19,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 05:08:19,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:19,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:19,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:08:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:19,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:19,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:19,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:19,638 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:19,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:19,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:19,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250928303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:19,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:19,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:19,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614658644] [2022-01-18 05:08:19,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:19,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:19,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:19,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:19,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:19,645 INFO L87 Difference]: Start difference. First operand 461 states and 1384 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:20,005 INFO L93 Difference]: Finished difference Result 718 states and 2111 transitions. [2022-01-18 05:08:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:20,007 INFO L225 Difference]: With dead ends: 718 [2022-01-18 05:08:20,007 INFO L226 Difference]: Without dead ends: 718 [2022-01-18 05:08:20,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:08:20,007 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 132 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:20,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 193 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-18 05:08:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 473. [2022-01-18 05:08:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.0402542372881354) internal successors, (1435), 472 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1435 transitions. [2022-01-18 05:08:20,014 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1435 transitions. Word has length 22 [2022-01-18 05:08:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:20,014 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1435 transitions. [2022-01-18 05:08:20,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1435 transitions. [2022-01-18 05:08:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:20,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:20,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:20,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 05:08:20,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 05:08:20,215 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1401454663, now seen corresponding path program 131 times [2022-01-18 05:08:20,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:20,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638848963] [2022-01-18 05:08:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:20,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:20,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638848963] [2022-01-18 05:08:20,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638848963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574263101] [2022-01-18 05:08:20,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:20,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:20,305 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) [2022-01-18 05:08:20,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 05:08:20,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:20,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:20,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:20,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:20,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:08:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:20,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:20,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:20,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 05:08:20,849 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:20,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:20,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:20,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574263101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:20,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:20,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:20,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045402174] [2022-01-18 05:08:20,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:20,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:20,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:20,859 INFO L87 Difference]: Start difference. First operand 473 states and 1435 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:21,181 INFO L93 Difference]: Finished difference Result 688 states and 2027 transitions. [2022-01-18 05:08:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:08:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:21,182 INFO L225 Difference]: With dead ends: 688 [2022-01-18 05:08:21,182 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 05:08:21,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:21,183 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 132 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:21,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 159 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 05:08:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 480. [2022-01-18 05:08:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0250521920668056) internal successors, (1449), 479 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1449 transitions. [2022-01-18 05:08:21,188 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1449 transitions. Word has length 22 [2022-01-18 05:08:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:21,189 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1449 transitions. [2022-01-18 05:08:21,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1449 transitions. [2022-01-18 05:08:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:21,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:21,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:21,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:21,390 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,SelfDestructingSolverStorable147 [2022-01-18 05:08:21,390 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1720566983, now seen corresponding path program 132 times [2022-01-18 05:08:21,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:21,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503059992] [2022-01-18 05:08:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:21,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:21,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:21,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503059992] [2022-01-18 05:08:21,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503059992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:21,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653786618] [2022-01-18 05:08:21,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:21,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:21,481 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) [2022-01-18 05:08:21,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 05:08:21,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:08:21,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:21,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:21,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:21,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:21,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:21,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:22,071 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:22,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:22,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:22,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653786618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:22,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:22,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:22,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728216443] [2022-01-18 05:08:22,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:22,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:22,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:22,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:22,078 INFO L87 Difference]: Start difference. First operand 480 states and 1449 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:22,358 INFO L93 Difference]: Finished difference Result 612 states and 1824 transitions. [2022-01-18 05:08:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:22,359 INFO L225 Difference]: With dead ends: 612 [2022-01-18 05:08:22,359 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 05:08:22,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:22,359 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:22,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 162 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 05:08:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 458. [2022-01-18 05:08:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.008752735229759) internal successors, (1375), 457 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1375 transitions. [2022-01-18 05:08:22,364 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1375 transitions. Word has length 22 [2022-01-18 05:08:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:22,365 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1375 transitions. [2022-01-18 05:08:22,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1375 transitions. [2022-01-18 05:08:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:22,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:22,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:22,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:22,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:22,566 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash -88220487, now seen corresponding path program 133 times [2022-01-18 05:08:22,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:22,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132344812] [2022-01-18 05:08:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:22,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:22,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132344812] [2022-01-18 05:08:22,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132344812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816756808] [2022-01-18 05:08:22,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:22,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:22,654 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) [2022-01-18 05:08:22,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 05:08:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:22,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:22,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:22,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:08:22,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:08:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:23,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:23,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:23,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:23,278 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:23,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:23,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:23,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816756808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:23,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:23,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:23,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704604243] [2022-01-18 05:08:23,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:23,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:23,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:23,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:23,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:23,285 INFO L87 Difference]: Start difference. First operand 458 states and 1375 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:23,740 INFO L93 Difference]: Finished difference Result 805 states and 2356 transitions. [2022-01-18 05:08:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:08:23,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:23,741 INFO L225 Difference]: With dead ends: 805 [2022-01-18 05:08:23,742 INFO L226 Difference]: Without dead ends: 805 [2022-01-18 05:08:23,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:08:23,742 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 161 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:23,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 233 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-18 05:08:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 472. [2022-01-18 05:08:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.05307855626327) internal successors, (1438), 471 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1438 transitions. [2022-01-18 05:08:23,748 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1438 transitions. Word has length 22 [2022-01-18 05:08:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:23,748 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1438 transitions. [2022-01-18 05:08:23,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1438 transitions. [2022-01-18 05:08:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:23,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:23,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:23,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:23,949 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,SelfDestructingSolverStorable149 [2022-01-18 05:08:23,950 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1406382477, now seen corresponding path program 134 times [2022-01-18 05:08:23,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:23,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469330819] [2022-01-18 05:08:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:23,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:24,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469330819] [2022-01-18 05:08:24,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469330819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557383119] [2022-01-18 05:08:24,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:24,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:24,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:24,035 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) [2022-01-18 05:08:24,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 05:08:24,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:24,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:24,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:24,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:24,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:08:24,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:08:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:24,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:24,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:24,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:24,676 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:24,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:24,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:24,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557383119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:24,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:24,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:24,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599083220] [2022-01-18 05:08:24,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:24,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:24,684 INFO L87 Difference]: Start difference. First operand 472 states and 1438 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:25,028 INFO L93 Difference]: Finished difference Result 818 states and 2379 transitions. [2022-01-18 05:08:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:08:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:25,030 INFO L225 Difference]: With dead ends: 818 [2022-01-18 05:08:25,030 INFO L226 Difference]: Without dead ends: 808 [2022-01-18 05:08:25,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:08:25,030 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 190 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:25,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 172 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-18 05:08:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 479. [2022-01-18 05:08:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.0376569037656904) internal successors, (1452), 478 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1452 transitions. [2022-01-18 05:08:25,036 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1452 transitions. Word has length 22 [2022-01-18 05:08:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:25,036 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1452 transitions. [2022-01-18 05:08:25,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1452 transitions. [2022-01-18 05:08:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:25,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:25,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:25,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 05:08:25,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:25,238 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1847509627, now seen corresponding path program 135 times [2022-01-18 05:08:25,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:25,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611627569] [2022-01-18 05:08:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:25,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:25,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:25,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611627569] [2022-01-18 05:08:25,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611627569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:25,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233239822] [2022-01-18 05:08:25,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:25,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:25,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:25,347 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) [2022-01-18 05:08:25,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 05:08:25,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:08:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:25,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:25,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:08:25,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:08:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:25,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:25,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:25,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:26,003 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:26,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:26,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:26,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233239822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:26,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:26,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:26,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827041882] [2022-01-18 05:08:26,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:26,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:26,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:26,010 INFO L87 Difference]: Start difference. First operand 479 states and 1452 transitions. Second operand has 23 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) [2022-01-18 05:08:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:26,579 INFO L93 Difference]: Finished difference Result 916 states and 2638 transitions. [2022-01-18 05:08:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:08:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:08:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:26,580 INFO L225 Difference]: With dead ends: 916 [2022-01-18 05:08:26,580 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 05:08:26,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:08:26,581 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:26,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 310 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 05:08:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 477. [2022-01-18 05:08:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.0315126050420167) internal successors, (1443), 476 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1443 transitions. [2022-01-18 05:08:26,587 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1443 transitions. Word has length 22 [2022-01-18 05:08:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:26,587 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1443 transitions. [2022-01-18 05:08:26,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:08:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1443 transitions. [2022-01-18 05:08:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:26,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:26,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:26,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 05:08:26,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:26,789 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash 370628365, now seen corresponding path program 136 times [2022-01-18 05:08:26,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:26,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843993663] [2022-01-18 05:08:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:26,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:26,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843993663] [2022-01-18 05:08:26,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843993663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940114657] [2022-01-18 05:08:26,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:26,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:26,875 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) [2022-01-18 05:08:26,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 05:08:27,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:27,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:27,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-01-18 05:08:27,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-18 05:08:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:27,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:27,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:27,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:27,547 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:27,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:27,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940114657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:27,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:27,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440707158] [2022-01-18 05:08:27,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:27,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:27,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:27,555 INFO L87 Difference]: Start difference. First operand 477 states and 1443 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:27,955 INFO L93 Difference]: Finished difference Result 838 states and 2437 transitions. [2022-01-18 05:08:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:27,956 INFO L225 Difference]: With dead ends: 838 [2022-01-18 05:08:27,956 INFO L226 Difference]: Without dead ends: 829 [2022-01-18 05:08:27,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:08:27,957 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 167 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:27,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 203 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-18 05:08:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 491. [2022-01-18 05:08:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.0428571428571427) internal successors, (1491), 490 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1491 transitions. [2022-01-18 05:08:27,963 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1491 transitions. Word has length 22 [2022-01-18 05:08:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:27,963 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1491 transitions. [2022-01-18 05:08:27,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1491 transitions. [2022-01-18 05:08:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:27,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:27,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:27,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 05:08:28,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:28,165 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash 712877859, now seen corresponding path program 137 times [2022-01-18 05:08:28,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:28,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239126190] [2022-01-18 05:08:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:28,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:28,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:28,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239126190] [2022-01-18 05:08:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239126190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:28,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280910756] [2022-01-18 05:08:28,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:28,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:28,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:28,246 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) [2022-01-18 05:08:28,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 05:08:28,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:28,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:28,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:28,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:28,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:08:28,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:08:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:28,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:28,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:28,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 05:08:28,880 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:28,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:28,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:28,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280910756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:28,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:28,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:28,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678445896] [2022-01-18 05:08:28,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:28,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:28,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:28,887 INFO L87 Difference]: Start difference. First operand 491 states and 1491 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:29,328 INFO L93 Difference]: Finished difference Result 886 states and 2539 transitions. [2022-01-18 05:08:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:08:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:29,329 INFO L225 Difference]: With dead ends: 886 [2022-01-18 05:08:29,329 INFO L226 Difference]: Without dead ends: 876 [2022-01-18 05:08:29,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:08:29,330 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 216 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:29,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 193 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-18 05:08:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 503. [2022-01-18 05:08:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.045816733067729) internal successors, (1529), 502 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1529 transitions. [2022-01-18 05:08:29,337 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1529 transitions. Word has length 22 [2022-01-18 05:08:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:29,337 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1529 transitions. [2022-01-18 05:08:29,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1529 transitions. [2022-01-18 05:08:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:29,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:29,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:29,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 05:08:29,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:29,538 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash -867894057, now seen corresponding path program 138 times [2022-01-18 05:08:29,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:29,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170548229] [2022-01-18 05:08:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:29,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:29,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:29,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170548229] [2022-01-18 05:08:29,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170548229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:29,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099799785] [2022-01-18 05:08:29,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:29,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:29,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:29,625 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) [2022-01-18 05:08:29,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 05:08:29,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:08:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:29,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:29,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:29,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:08:29,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:08:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:30,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:30,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:30,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 05:08:30,265 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:30,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:30,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:30,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099799785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:30,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:30,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:30,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658330469] [2022-01-18 05:08:30,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:30,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:30,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:30,272 INFO L87 Difference]: Start difference. First operand 503 states and 1529 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:30,686 INFO L93 Difference]: Finished difference Result 833 states and 2402 transitions. [2022-01-18 05:08:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:30,688 INFO L225 Difference]: With dead ends: 833 [2022-01-18 05:08:30,688 INFO L226 Difference]: Without dead ends: 821 [2022-01-18 05:08:30,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:08:30,688 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 127 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:30,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 246 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-18 05:08:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 499. [2022-01-18 05:08:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.0461847389558234) internal successors, (1517), 498 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1517 transitions. [2022-01-18 05:08:30,694 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1517 transitions. Word has length 22 [2022-01-18 05:08:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1517 transitions. [2022-01-18 05:08:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1517 transitions. [2022-01-18 05:08:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:30,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:30,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:30,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:30,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-01-18 05:08:30,896 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1148998577, now seen corresponding path program 139 times [2022-01-18 05:08:30,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:30,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312354640] [2022-01-18 05:08:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:30,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:30,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:30,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312354640] [2022-01-18 05:08:30,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312354640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:30,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839184153] [2022-01-18 05:08:30,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:30,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:30,987 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) [2022-01-18 05:08:30,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 05:08:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:31,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:31,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:08:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:31,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:31,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:31,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:31,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:31,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:31,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:31,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839184153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:31,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:31,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:31,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201092227] [2022-01-18 05:08:31,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:31,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:31,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:31,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:31,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:31,623 INFO L87 Difference]: Start difference. First operand 499 states and 1517 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:32,062 INFO L93 Difference]: Finished difference Result 764 states and 2239 transitions. [2022-01-18 05:08:32,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:32,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:32,063 INFO L225 Difference]: With dead ends: 764 [2022-01-18 05:08:32,064 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 05:08:32,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:08:32,064 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:32,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 235 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 05:08:32,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 504. [2022-01-18 05:08:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.0417495029821073) internal successors, (1530), 503 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1530 transitions. [2022-01-18 05:08:32,070 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1530 transitions. Word has length 22 [2022-01-18 05:08:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:32,070 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1530 transitions. [2022-01-18 05:08:32,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1530 transitions. [2022-01-18 05:08:32,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:32,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:32,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:32,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 05:08:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 05:08:32,272 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash 345604387, now seen corresponding path program 140 times [2022-01-18 05:08:32,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005014016] [2022-01-18 05:08:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:32,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:32,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005014016] [2022-01-18 05:08:32,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005014016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949793215] [2022-01-18 05:08:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:32,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:32,384 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) [2022-01-18 05:08:32,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 05:08:32,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:32,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:32,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:32,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:32,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-01-18 05:08:32,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 05:08:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:32,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:32,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:32,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:33,038 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:33,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:33,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:33,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949793215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:33,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:33,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:33,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476954762] [2022-01-18 05:08:33,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:33,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:33,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:33,045 INFO L87 Difference]: Start difference. First operand 504 states and 1530 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:33,406 INFO L93 Difference]: Finished difference Result 734 states and 2164 transitions. [2022-01-18 05:08:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:08:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:33,407 INFO L225 Difference]: With dead ends: 734 [2022-01-18 05:08:33,407 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 05:08:33,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:08:33,407 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:33,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 218 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 05:08:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 483. [2022-01-18 05:08:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0228215767634854) internal successors, (1457), 482 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1457 transitions. [2022-01-18 05:08:33,413 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1457 transitions. Word has length 22 [2022-01-18 05:08:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:33,413 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1457 transitions. [2022-01-18 05:08:33,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1457 transitions. [2022-01-18 05:08:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:33,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:33,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:33,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:33,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:33,614 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:33,615 INFO L85 PathProgramCache]: Analyzing trace with hash -180315899, now seen corresponding path program 141 times [2022-01-18 05:08:33,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:33,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082888098] [2022-01-18 05:08:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:33,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:33,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082888098] [2022-01-18 05:08:33,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082888098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849244775] [2022-01-18 05:08:33,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:33,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:33,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:33,708 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) [2022-01-18 05:08:33,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 05:08:33,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:33,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:33,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:33,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:34,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:34,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:34,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:34,394 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:34,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:34,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:34,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849244775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:34,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:34,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:34,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178845231] [2022-01-18 05:08:34,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:34,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:34,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:34,401 INFO L87 Difference]: Start difference. First operand 483 states and 1457 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:34,773 INFO L93 Difference]: Finished difference Result 663 states and 1977 transitions. [2022-01-18 05:08:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:34,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:34,775 INFO L225 Difference]: With dead ends: 663 [2022-01-18 05:08:34,775 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 05:08:34,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:08:34,775 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:34,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 223 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 05:08:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 480. [2022-01-18 05:08:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.022964509394572) internal successors, (1448), 479 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1448 transitions. [2022-01-18 05:08:34,781 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1448 transitions. Word has length 22 [2022-01-18 05:08:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:34,781 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1448 transitions. [2022-01-18 05:08:34,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1448 transitions. [2022-01-18 05:08:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:34,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:34,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:34,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 05:08:34,982 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,SelfDestructingSolverStorable157 [2022-01-18 05:08:34,982 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash 325901489, now seen corresponding path program 142 times [2022-01-18 05:08:34,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:34,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278603163] [2022-01-18 05:08:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:34,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:35,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:35,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278603163] [2022-01-18 05:08:35,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278603163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000746731] [2022-01-18 05:08:35,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:35,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:35,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:35,078 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) [2022-01-18 05:08:35,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 05:08:35,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:35,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:35,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:35,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:35,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:08:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:35,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:35,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:35,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:35,732 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:35,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:35,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:35,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000746731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:35,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:35,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:35,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734403364] [2022-01-18 05:08:35,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:35,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:35,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:35,739 INFO L87 Difference]: Start difference. First operand 480 states and 1448 transitions. Second operand has 23 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) [2022-01-18 05:08:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:36,183 INFO L93 Difference]: Finished difference Result 709 states and 2062 transitions. [2022-01-18 05:08:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:36,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:08:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:36,191 INFO L225 Difference]: With dead ends: 709 [2022-01-18 05:08:36,192 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 05:08:36,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:08:36,192 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 202 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:36,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 218 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 05:08:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 480. [2022-01-18 05:08:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.022964509394572) internal successors, (1448), 479 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1448 transitions. [2022-01-18 05:08:36,198 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1448 transitions. Word has length 22 [2022-01-18 05:08:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:36,198 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1448 transitions. [2022-01-18 05:08:36,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:08:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1448 transitions. [2022-01-18 05:08:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:36,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:36,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:36,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 05:08:36,399 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,SelfDestructingSolverStorable158 [2022-01-18 05:08:36,399 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1750927815, now seen corresponding path program 143 times [2022-01-18 05:08:36,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64627974] [2022-01-18 05:08:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:36,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:36,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64627974] [2022-01-18 05:08:36,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64627974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082446317] [2022-01-18 05:08:36,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:36,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:36,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:36,491 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) [2022-01-18 05:08:36,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 05:08:36,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:36,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:36,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:08:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:36,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:37,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:37,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 05:08:37,093 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:37,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:37,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:37,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082446317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:37,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:37,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:37,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856090840] [2022-01-18 05:08:37,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:37,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:37,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:37,100 INFO L87 Difference]: Start difference. First operand 480 states and 1448 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:37,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:37,483 INFO L93 Difference]: Finished difference Result 694 states and 2024 transitions. [2022-01-18 05:08:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:37,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:37,484 INFO L225 Difference]: With dead ends: 694 [2022-01-18 05:08:37,484 INFO L226 Difference]: Without dead ends: 685 [2022-01-18 05:08:37,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:08:37,484 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:37,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 212 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-18 05:08:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 488. [2022-01-18 05:08:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.0102669404517455) internal successors, (1466), 487 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1466 transitions. [2022-01-18 05:08:37,490 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1466 transitions. Word has length 22 [2022-01-18 05:08:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:37,490 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1466 transitions. [2022-01-18 05:08:37,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1466 transitions. [2022-01-18 05:08:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:37,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:37,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:37,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 05:08:37,691 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,SelfDestructingSolverStorable159 [2022-01-18 05:08:37,691 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1786527141, now seen corresponding path program 144 times [2022-01-18 05:08:37,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497171974] [2022-01-18 05:08:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:37,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:37,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497171974] [2022-01-18 05:08:37,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497171974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364711948] [2022-01-18 05:08:37,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:37,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:37,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:37,805 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) [2022-01-18 05:08:37,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 05:08:37,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:38,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:08:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:38,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:38,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:38,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:08:38,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:38,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:38,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:38,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364711948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:38,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:38,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:38,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155429874] [2022-01-18 05:08:38,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:38,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:38,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:38,444 INFO L87 Difference]: Start difference. First operand 488 states and 1466 transitions. Second operand has 23 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) [2022-01-18 05:08:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:38,832 INFO L93 Difference]: Finished difference Result 619 states and 1842 transitions. [2022-01-18 05:08:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:38,833 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:08:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:38,833 INFO L225 Difference]: With dead ends: 619 [2022-01-18 05:08:38,834 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 05:08:38,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:08:38,834 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:38,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 232 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 05:08:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 458. [2022-01-18 05:08:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.008752735229759) internal successors, (1375), 457 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1375 transitions. [2022-01-18 05:08:38,839 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1375 transitions. Word has length 22 [2022-01-18 05:08:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:38,839 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1375 transitions. [2022-01-18 05:08:38,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:08:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1375 transitions. [2022-01-18 05:08:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:38,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:38,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:38,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 05:08:39,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:39,040 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1957780507, now seen corresponding path program 145 times [2022-01-18 05:08:39,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453529618] [2022-01-18 05:08:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:39,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:39,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:39,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453529618] [2022-01-18 05:08:39,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453529618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:39,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131888701] [2022-01-18 05:08:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:39,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:39,120 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) [2022-01-18 05:08:39,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 05:08:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:39,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:39,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:39,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:08:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:39,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:39,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:39,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:39,842 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:39,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:39,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:39,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131888701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:39,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:39,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:39,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929273596] [2022-01-18 05:08:39,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:39,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:39,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:39,849 INFO L87 Difference]: Start difference. First operand 458 states and 1375 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:40,287 INFO L93 Difference]: Finished difference Result 928 states and 2712 transitions. [2022-01-18 05:08:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:40,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:40,288 INFO L225 Difference]: With dead ends: 928 [2022-01-18 05:08:40,288 INFO L226 Difference]: Without dead ends: 928 [2022-01-18 05:08:40,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:08:40,289 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:40,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 233 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-18 05:08:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 478. [2022-01-18 05:08:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.050314465408805) internal successors, (1455), 477 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1455 transitions. [2022-01-18 05:08:40,295 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1455 transitions. Word has length 22 [2022-01-18 05:08:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:40,295 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1455 transitions. [2022-01-18 05:08:40,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1455 transitions. [2022-01-18 05:08:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:40,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:40,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:40,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 05:08:40,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:40,497 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:40,497 INFO L85 PathProgramCache]: Analyzing trace with hash -463177543, now seen corresponding path program 146 times [2022-01-18 05:08:40,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:40,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114340754] [2022-01-18 05:08:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:40,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:40,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:40,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114340754] [2022-01-18 05:08:40,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114340754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:40,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442751696] [2022-01-18 05:08:40,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:40,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:40,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:40,575 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) [2022-01-18 05:08:40,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 05:08:40,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:40,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:40,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:40,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:40,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:40,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:08:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:41,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:41,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:41,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:41,284 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:41,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:41,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:41,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442751696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:41,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:41,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:41,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670411449] [2022-01-18 05:08:41,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:41,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:41,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:41,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:41,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:41,291 INFO L87 Difference]: Start difference. First operand 478 states and 1455 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:41,867 INFO L93 Difference]: Finished difference Result 940 states and 2734 transitions. [2022-01-18 05:08:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:08:41,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:41,869 INFO L225 Difference]: With dead ends: 940 [2022-01-18 05:08:41,869 INFO L226 Difference]: Without dead ends: 930 [2022-01-18 05:08:41,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:08:41,869 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 252 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:41,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 177 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-18 05:08:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 475. [2022-01-18 05:08:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.0443037974683542) internal successors, (1443), 474 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1443 transitions. [2022-01-18 05:08:41,885 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1443 transitions. Word has length 22 [2022-01-18 05:08:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:41,885 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1443 transitions. [2022-01-18 05:08:41,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1443 transitions. [2022-01-18 05:08:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:41,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:41,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:41,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 05:08:42,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:42,086 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash -38230333, now seen corresponding path program 147 times [2022-01-18 05:08:42,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:42,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522016466] [2022-01-18 05:08:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:42,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:42,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522016466] [2022-01-18 05:08:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522016466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397366854] [2022-01-18 05:08:42,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:42,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:42,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:42,160 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) [2022-01-18 05:08:42,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 05:08:42,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:42,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:42,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:42,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:42,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:42,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:42,812 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:42,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:42,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397366854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:42,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:42,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:42,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591511791] [2022-01-18 05:08:42,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:42,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:42,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:42,819 INFO L87 Difference]: Start difference. First operand 475 states and 1443 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:43,287 INFO L93 Difference]: Finished difference Result 925 states and 2704 transitions. [2022-01-18 05:08:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:08:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:43,289 INFO L225 Difference]: With dead ends: 925 [2022-01-18 05:08:43,289 INFO L226 Difference]: Without dead ends: 905 [2022-01-18 05:08:43,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:08:43,289 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 185 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:43,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 229 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-01-18 05:08:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 472. [2022-01-18 05:08:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.038216560509554) internal successors, (1431), 471 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1431 transitions. [2022-01-18 05:08:43,295 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1431 transitions. Word has length 22 [2022-01-18 05:08:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:43,295 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1431 transitions. [2022-01-18 05:08:43,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1431 transitions. [2022-01-18 05:08:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:43,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:43,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:43,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 05:08:43,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:43,497 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1733366227, now seen corresponding path program 148 times [2022-01-18 05:08:43,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352172928] [2022-01-18 05:08:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:43,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:43,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352172928] [2022-01-18 05:08:43,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352172928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162707220] [2022-01-18 05:08:43,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:43,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:43,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:43,562 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) [2022-01-18 05:08:43,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 05:08:43,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:43,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:43,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:43,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:44,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:44,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:44,232 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:44,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:44,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:44,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162707220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:44,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:44,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:44,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169383500] [2022-01-18 05:08:44,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:44,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:44,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:44,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:44,239 INFO L87 Difference]: Start difference. First operand 472 states and 1431 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:44,684 INFO L93 Difference]: Finished difference Result 934 states and 2699 transitions. [2022-01-18 05:08:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:44,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:44,695 INFO L225 Difference]: With dead ends: 934 [2022-01-18 05:08:44,695 INFO L226 Difference]: Without dead ends: 898 [2022-01-18 05:08:44,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:08:44,695 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:44,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 247 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-01-18 05:08:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 466. [2022-01-18 05:08:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0258064516129033) internal successors, (1407), 465 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1407 transitions. [2022-01-18 05:08:44,702 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1407 transitions. Word has length 22 [2022-01-18 05:08:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:44,702 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1407 transitions. [2022-01-18 05:08:44,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1407 transitions. [2022-01-18 05:08:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:44,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:44,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:44,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:44,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:44,903 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash -257969397, now seen corresponding path program 149 times [2022-01-18 05:08:44,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:44,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534365265] [2022-01-18 05:08:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:44,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:44,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:44,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534365265] [2022-01-18 05:08:44,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534365265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:44,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938180447] [2022-01-18 05:08:44,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:44,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:44,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:44,983 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) [2022-01-18 05:08:44,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 05:08:45,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:45,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:45,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:45,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:45,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:08:45,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 05:08:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:45,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:45,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:45,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:45,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:45,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:45,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:45,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938180447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:45,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:45,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:45,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883049155] [2022-01-18 05:08:45,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:45,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:45,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:45,731 INFO L87 Difference]: Start difference. First operand 466 states and 1407 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:46,128 INFO L93 Difference]: Finished difference Result 831 states and 2435 transitions. [2022-01-18 05:08:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:46,129 INFO L225 Difference]: With dead ends: 831 [2022-01-18 05:08:46,129 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 05:08:46,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:08:46,129 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 221 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:46,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 165 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 05:08:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 474. [2022-01-18 05:08:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.044397463002114) internal successors, (1440), 473 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1440 transitions. [2022-01-18 05:08:46,136 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1440 transitions. Word has length 22 [2022-01-18 05:08:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1440 transitions. [2022-01-18 05:08:46,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1440 transitions. [2022-01-18 05:08:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:46,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:46,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:46,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:46,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:46,337 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:46,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1236633567, now seen corresponding path program 150 times [2022-01-18 05:08:46,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:46,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319101793] [2022-01-18 05:08:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:46,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:46,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:46,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319101793] [2022-01-18 05:08:46,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319101793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:46,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477922751] [2022-01-18 05:08:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:46,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:46,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:46,415 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) [2022-01-18 05:08:46,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 05:08:46,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:08:46,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:46,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:46,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:46,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:08:46,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 05:08:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:46,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:47,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:47,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:47,160 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:47,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:47,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:47,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477922751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:47,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:47,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:47,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275590780] [2022-01-18 05:08:47,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:47,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:47,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:47,167 INFO L87 Difference]: Start difference. First operand 474 states and 1440 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:47,946 INFO L93 Difference]: Finished difference Result 911 states and 2660 transitions. [2022-01-18 05:08:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:08:47,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:47,947 INFO L225 Difference]: With dead ends: 911 [2022-01-18 05:08:47,947 INFO L226 Difference]: Without dead ends: 901 [2022-01-18 05:08:47,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:08:47,948 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 259 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:47,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 245 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-01-18 05:08:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 471. [2022-01-18 05:08:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0382978723404257) internal successors, (1428), 470 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1428 transitions. [2022-01-18 05:08:47,954 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1428 transitions. Word has length 22 [2022-01-18 05:08:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:47,954 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1428 transitions. [2022-01-18 05:08:47,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1428 transitions. [2022-01-18 05:08:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:47,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:47,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:47,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 05:08:48,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 05:08:48,155 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1661580777, now seen corresponding path program 151 times [2022-01-18 05:08:48,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:48,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430107614] [2022-01-18 05:08:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:48,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:48,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430107614] [2022-01-18 05:08:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430107614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935868806] [2022-01-18 05:08:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:48,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:48,227 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) [2022-01-18 05:08:48,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 05:08:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:48,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:48,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:48,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:48,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:48,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:48,901 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:48,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:48,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:48,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935868806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:48,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:48,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:48,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539024228] [2022-01-18 05:08:48,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:48,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:48,909 INFO L87 Difference]: Start difference. First operand 471 states and 1428 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:49,504 INFO L93 Difference]: Finished difference Result 840 states and 2457 transitions. [2022-01-18 05:08:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:08:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:49,505 INFO L225 Difference]: With dead ends: 840 [2022-01-18 05:08:49,505 INFO L226 Difference]: Without dead ends: 820 [2022-01-18 05:08:49,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:08:49,506 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:49,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 236 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-18 05:08:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 468. [2022-01-18 05:08:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.032119914346895) internal successors, (1416), 467 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1416 transitions. [2022-01-18 05:08:49,512 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1416 transitions. Word has length 22 [2022-01-18 05:08:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:49,512 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1416 transitions. [2022-01-18 05:08:49,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1416 transitions. [2022-01-18 05:08:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:49,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:49,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:49,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:49,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 05:08:49,714 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1038642111, now seen corresponding path program 152 times [2022-01-18 05:08:49,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:49,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335099899] [2022-01-18 05:08:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:49,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:49,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:49,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335099899] [2022-01-18 05:08:49,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335099899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:49,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839349192] [2022-01-18 05:08:49,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:49,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:49,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:49,798 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) [2022-01-18 05:08:49,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 05:08:49,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:49,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:50,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:50,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:08:50,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:08:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:50,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:50,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:50,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:50,557 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:50,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:50,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:50,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839349192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:50,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:50,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:50,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557623920] [2022-01-18 05:08:50,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:50,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:50,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:50,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:50,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:50,564 INFO L87 Difference]: Start difference. First operand 468 states and 1416 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:51,136 INFO L93 Difference]: Finished difference Result 949 states and 2771 transitions. [2022-01-18 05:08:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:51,138 INFO L225 Difference]: With dead ends: 949 [2022-01-18 05:08:51,138 INFO L226 Difference]: Without dead ends: 949 [2022-01-18 05:08:51,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:08:51,138 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 228 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:51,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 236 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-18 05:08:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 478. [2022-01-18 05:08:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.0670859538784065) internal successors, (1463), 477 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1463 transitions. [2022-01-18 05:08:51,145 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1463 transitions. Word has length 22 [2022-01-18 05:08:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:51,146 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1463 transitions. [2022-01-18 05:08:51,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1463 transitions. [2022-01-18 05:08:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:51,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:51,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:51,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:51,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 05:08:51,347 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1761722221, now seen corresponding path program 153 times [2022-01-18 05:08:51,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150156018] [2022-01-18 05:08:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:51,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:51,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150156018] [2022-01-18 05:08:51,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150156018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109806137] [2022-01-18 05:08:51,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:51,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:51,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:51,429 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) [2022-01-18 05:08:51,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 05:08:51,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:51,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:51,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:51,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:51,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:08:51,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:08:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:51,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:52,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:52,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:52,124 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:52,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:52,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:52,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109806137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:52,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:52,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:52,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407005014] [2022-01-18 05:08:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:52,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:52,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:52,134 INFO L87 Difference]: Start difference. First operand 478 states and 1463 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:53,104 INFO L93 Difference]: Finished difference Result 1028 states and 2983 transitions. [2022-01-18 05:08:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:08:53,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:53,106 INFO L225 Difference]: With dead ends: 1028 [2022-01-18 05:08:53,106 INFO L226 Difference]: Without dead ends: 1018 [2022-01-18 05:08:53,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:08:53,106 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 317 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:53,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 270 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-01-18 05:08:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 485. [2022-01-18 05:08:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.0516528925619837) internal successors, (1477), 484 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1477 transitions. [2022-01-18 05:08:53,113 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1477 transitions. Word has length 22 [2022-01-18 05:08:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:53,113 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1477 transitions. [2022-01-18 05:08:53,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1477 transitions. [2022-01-18 05:08:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:53,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:53,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:53,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 05:08:53,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:53,314 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -720647029, now seen corresponding path program 154 times [2022-01-18 05:08:53,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294458069] [2022-01-18 05:08:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:53,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:53,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:53,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294458069] [2022-01-18 05:08:53,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294458069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:53,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555559803] [2022-01-18 05:08:53,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:53,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:53,415 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) [2022-01-18 05:08:53,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 05:08:53,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:53,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:53,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:53,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:08:53,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:08:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:54,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:54,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:54,148 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:54,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:54,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:54,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555559803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:54,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:54,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:08:54,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667521135] [2022-01-18 05:08:54,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:54,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:08:54,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:54,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:08:54,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:54,156 INFO L87 Difference]: Start difference. First operand 485 states and 1477 transitions. Second operand has 23 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) [2022-01-18 05:08:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:54,653 INFO L93 Difference]: Finished difference Result 957 states and 2766 transitions. [2022-01-18 05:08:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:08:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:08:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:54,655 INFO L225 Difference]: With dead ends: 957 [2022-01-18 05:08:54,655 INFO L226 Difference]: Without dead ends: 957 [2022-01-18 05:08:54,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:08:54,655 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 189 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:54,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 213 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:08:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-18 05:08:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 462. [2022-01-18 05:08:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.013015184381779) internal successors, (1389), 461 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1389 transitions. [2022-01-18 05:08:54,662 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1389 transitions. Word has length 22 [2022-01-18 05:08:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:54,662 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1389 transitions. [2022-01-18 05:08:54,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:08:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1389 transitions. [2022-01-18 05:08:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:54,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:54,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:54,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:54,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:54,863 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1497490963, now seen corresponding path program 155 times [2022-01-18 05:08:54,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:54,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009176412] [2022-01-18 05:08:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:54,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:54,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009176412] [2022-01-18 05:08:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009176412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082508767] [2022-01-18 05:08:54,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:54,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:54,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:54,945 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) [2022-01-18 05:08:54,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 05:08:55,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:08:55,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:55,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:55,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:55,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 05:08:55,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-18 05:08:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:55,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:55,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:55,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:08:55,674 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:55,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:55,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:55,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082508767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:55,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:55,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:08:55,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851372500] [2022-01-18 05:08:55,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:55,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:55,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:55,681 INFO L87 Difference]: Start difference. First operand 462 states and 1389 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:56,187 INFO L93 Difference]: Finished difference Result 881 states and 2550 transitions. [2022-01-18 05:08:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:08:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:56,188 INFO L225 Difference]: With dead ends: 881 [2022-01-18 05:08:56,188 INFO L226 Difference]: Without dead ends: 872 [2022-01-18 05:08:56,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:08:56,189 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 171 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:56,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 230 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-18 05:08:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 482. [2022-01-18 05:08:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.043659043659044) internal successors, (1464), 481 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1464 transitions. [2022-01-18 05:08:56,195 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1464 transitions. Word has length 22 [2022-01-18 05:08:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:56,195 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1464 transitions. [2022-01-18 05:08:56,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1464 transitions. [2022-01-18 05:08:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:56,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:56,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:56,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 05:08:56,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:56,422 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1839740457, now seen corresponding path program 156 times [2022-01-18 05:08:56,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:56,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482158453] [2022-01-18 05:08:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:56,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:56,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482158453] [2022-01-18 05:08:56,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482158453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540848385] [2022-01-18 05:08:56,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:56,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:56,498 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) [2022-01-18 05:08:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 05:08:56,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:56,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:56,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:56,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 05:08:56,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:08:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:56,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:57,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:57,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:08:57,184 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:57,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:57,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:57,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540848385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:57,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:57,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:57,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550255326] [2022-01-18 05:08:57,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:57,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:57,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:57,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:57,191 INFO L87 Difference]: Start difference. First operand 482 states and 1464 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:58,206 INFO L93 Difference]: Finished difference Result 1003 states and 2854 transitions. [2022-01-18 05:08:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:08:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:58,207 INFO L225 Difference]: With dead ends: 1003 [2022-01-18 05:08:58,207 INFO L226 Difference]: Without dead ends: 993 [2022-01-18 05:08:58,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=416, Invalid=1306, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:08:58,208 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 268 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:58,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 249 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-18 05:08:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 504. [2022-01-18 05:08:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.0377733598409544) internal successors, (1528), 503 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1528 transitions. [2022-01-18 05:08:58,215 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1528 transitions. Word has length 22 [2022-01-18 05:08:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:58,215 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1528 transitions. [2022-01-18 05:08:58,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1528 transitions. [2022-01-18 05:08:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:58,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:58,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:58,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:58,416 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,SelfDestructingSolverStorable172 [2022-01-18 05:08:58,416 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash 258968541, now seen corresponding path program 157 times [2022-01-18 05:08:58,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225520012] [2022-01-18 05:08:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:58,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:58,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:58,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225520012] [2022-01-18 05:08:58,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225520012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:58,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789496224] [2022-01-18 05:08:58,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:58,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:58,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:58,493 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) [2022-01-18 05:08:58,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 05:08:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:08:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:58,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:08:58,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-01-18 05:08:58,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 05:08:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:58,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:59,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:59,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:08:59,186 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:08:59,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:08:59,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:08:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789496224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:59,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:59,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:08:59,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848097773] [2022-01-18 05:08:59,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:59,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:59,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:59,193 INFO L87 Difference]: Start difference. First operand 504 states and 1528 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:59,978 INFO L93 Difference]: Finished difference Result 960 states and 2743 transitions. [2022-01-18 05:08:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:08:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:08:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:59,980 INFO L225 Difference]: With dead ends: 960 [2022-01-18 05:08:59,980 INFO L226 Difference]: Without dead ends: 948 [2022-01-18 05:08:59,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:08:59,981 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 234 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:08:59,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 252 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:08:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-18 05:08:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 484. [2022-01-18 05:08:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.039337474120083) internal successors, (1468), 483 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:08:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1468 transitions. [2022-01-18 05:08:59,987 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1468 transitions. Word has length 22 [2022-01-18 05:08:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1468 transitions. [2022-01-18 05:08:59,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:08:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1468 transitions. [2022-01-18 05:08:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:08:59,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:59,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:00,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:00,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:00,188 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:00,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1637774099, now seen corresponding path program 158 times [2022-01-18 05:09:00,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:00,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514476427] [2022-01-18 05:09:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:00,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:00,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:00,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514476427] [2022-01-18 05:09:00,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514476427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:00,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805876999] [2022-01-18 05:09:00,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:00,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:00,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:00,258 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) [2022-01-18 05:09:00,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 05:09:00,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:00,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:00,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:00,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:00,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:00,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:00,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:00,929 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:00,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:00,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:00,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805876999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:00,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:00,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:00,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354049590] [2022-01-18 05:09:00,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:00,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:00,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:00,936 INFO L87 Difference]: Start difference. First operand 484 states and 1468 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:01,436 INFO L93 Difference]: Finished difference Result 829 states and 2424 transitions. [2022-01-18 05:09:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:01,437 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:01,438 INFO L225 Difference]: With dead ends: 829 [2022-01-18 05:09:01,438 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 05:09:01,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:09:01,438 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:01,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 224 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 05:09:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 490. [2022-01-18 05:09:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.0286298568507157) internal successors, (1481), 489 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1481 transitions. [2022-01-18 05:09:01,444 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1481 transitions. Word has length 22 [2022-01-18 05:09:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:01,444 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1481 transitions. [2022-01-18 05:09:01,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1481 transitions. [2022-01-18 05:09:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:01,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:01,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:01,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:01,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:01,646 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash -121515041, now seen corresponding path program 159 times [2022-01-18 05:09:01,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:01,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630947778] [2022-01-18 05:09:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:01,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:01,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630947778] [2022-01-18 05:09:01,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630947778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396775885] [2022-01-18 05:09:01,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:01,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:01,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:01,721 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) [2022-01-18 05:09:01,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 05:09:01,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:09:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:01,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:01,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:02,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-18 05:09:02,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-01-18 05:09:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:02,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:02,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:02,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:02,404 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:02,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:02,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:02,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396775885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:02,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:02,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:02,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283475957] [2022-01-18 05:09:02,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:02,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:02,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:02,412 INFO L87 Difference]: Start difference. First operand 490 states and 1481 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:03,018 INFO L93 Difference]: Finished difference Result 907 states and 2602 transitions. [2022-01-18 05:09:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:09:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:03,020 INFO L225 Difference]: With dead ends: 907 [2022-01-18 05:09:03,020 INFO L226 Difference]: Without dead ends: 897 [2022-01-18 05:09:03,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:09:03,020 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 204 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:03,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 267 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-18 05:09:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 512. [2022-01-18 05:09:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.0234833659491196) internal successors, (1545), 511 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1545 transitions. [2022-01-18 05:09:03,027 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1545 transitions. Word has length 22 [2022-01-18 05:09:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:03,027 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1545 transitions. [2022-01-18 05:09:03,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1545 transitions. [2022-01-18 05:09:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:03,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:03,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:03,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 05:09:03,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:03,228 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1702286957, now seen corresponding path program 160 times [2022-01-18 05:09:03,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:03,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090236316] [2022-01-18 05:09:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:03,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:03,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:03,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090236316] [2022-01-18 05:09:03,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090236316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:03,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902450136] [2022-01-18 05:09:03,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:03,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:03,311 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) [2022-01-18 05:09:03,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 05:09:03,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:03,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:03,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:03,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:03,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-18 05:09:03,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-01-18 05:09:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:03,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:03,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:03,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:04,012 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:04,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:04,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:04,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902450136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:04,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:04,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:04,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933390269] [2022-01-18 05:09:04,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:04,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:04,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:04,020 INFO L87 Difference]: Start difference. First operand 512 states and 1545 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:04,466 INFO L93 Difference]: Finished difference Result 864 states and 2491 transitions. [2022-01-18 05:09:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:04,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:04,468 INFO L225 Difference]: With dead ends: 864 [2022-01-18 05:09:04,468 INFO L226 Difference]: Without dead ends: 849 [2022-01-18 05:09:04,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:09:04,468 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 181 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:04,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 181 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-18 05:09:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 486. [2022-01-18 05:09:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0350515463917525) internal successors, (1472), 485 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1472 transitions. [2022-01-18 05:09:04,475 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1472 transitions. Word has length 22 [2022-01-18 05:09:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:04,475 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1472 transitions. [2022-01-18 05:09:04,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1472 transitions. [2022-01-18 05:09:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:04,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:04,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:04,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-18 05:09:04,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:04,676 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 995359209, now seen corresponding path program 161 times [2022-01-18 05:09:04,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:04,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689719011] [2022-01-18 05:09:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:04,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:04,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689719011] [2022-01-18 05:09:04,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689719011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810855470] [2022-01-18 05:09:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:04,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:04,778 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) [2022-01-18 05:09:04,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 05:09:04,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:09:04,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:04,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:05,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:05,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:05,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:05,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:09:05,410 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:05,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:05,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:05,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810855470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:05,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:05,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:05,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200666310] [2022-01-18 05:09:05,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:05,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:05,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:05,417 INFO L87 Difference]: Start difference. First operand 486 states and 1472 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:05,853 INFO L93 Difference]: Finished difference Result 845 states and 2446 transitions. [2022-01-18 05:09:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:05,855 INFO L225 Difference]: With dead ends: 845 [2022-01-18 05:09:05,855 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 05:09:05,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:09:05,855 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 213 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:05,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 216 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 05:09:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 496. [2022-01-18 05:09:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.0161616161616163) internal successors, (1493), 495 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1493 transitions. [2022-01-18 05:09:05,861 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1493 transitions. Word has length 22 [2022-01-18 05:09:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:05,862 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1493 transitions. [2022-01-18 05:09:05,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1493 transitions. [2022-01-18 05:09:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:05,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:05,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:05,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 05:09:06,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-01-18 05:09:06,063 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1582207485, now seen corresponding path program 162 times [2022-01-18 05:09:06,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:06,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074804266] [2022-01-18 05:09:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:06,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:06,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:06,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074804266] [2022-01-18 05:09:06,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074804266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:06,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537226892] [2022-01-18 05:09:06,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:06,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:06,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:06,128 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) [2022-01-18 05:09:06,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 05:09:06,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:09:06,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:06,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:06,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:06,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:09:06,737 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:06,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:06,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:06,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537226892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:06,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:06,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:06,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285728219] [2022-01-18 05:09:06,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:06,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:06,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:06,744 INFO L87 Difference]: Start difference. First operand 496 states and 1493 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:07,237 INFO L93 Difference]: Finished difference Result 789 states and 2296 transitions. [2022-01-18 05:09:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:07,238 INFO L225 Difference]: With dead ends: 789 [2022-01-18 05:09:07,238 INFO L226 Difference]: Without dead ends: 769 [2022-01-18 05:09:07,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:09:07,238 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 136 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:07,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 244 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-18 05:09:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 502. [2022-01-18 05:09:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.0059880239520957) internal successors, (1506), 501 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1506 transitions. [2022-01-18 05:09:07,245 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1506 transitions. Word has length 22 [2022-01-18 05:09:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:07,245 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1506 transitions. [2022-01-18 05:09:07,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1506 transitions. [2022-01-18 05:09:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:07,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:07,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:07,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:07,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:07,446 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash 953470671, now seen corresponding path program 163 times [2022-01-18 05:09:07,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:07,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244379459] [2022-01-18 05:09:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:07,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:07,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244379459] [2022-01-18 05:09:07,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244379459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786118005] [2022-01-18 05:09:07,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:07,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:07,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:07,517 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) [2022-01-18 05:09:07,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 05:09:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:07,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:07,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:07,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-18 05:09:07,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-01-18 05:09:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:07,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:08,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:08,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:08,143 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:08,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:08,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786118005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:08,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:08,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:08,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038880205] [2022-01-18 05:09:08,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:08,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:08,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:08,150 INFO L87 Difference]: Start difference. First operand 502 states and 1506 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:08,619 INFO L93 Difference]: Finished difference Result 834 states and 2385 transitions. [2022-01-18 05:09:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:09:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:08,621 INFO L225 Difference]: With dead ends: 834 [2022-01-18 05:09:08,621 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 05:09:08,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:08,621 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:08,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 228 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 05:09:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 489. [2022-01-18 05:09:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.026639344262295) internal successors, (1477), 488 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1477 transitions. [2022-01-18 05:09:08,628 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1477 transitions. Word has length 22 [2022-01-18 05:09:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:08,628 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1477 transitions. [2022-01-18 05:09:08,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1477 transitions. [2022-01-18 05:09:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:08,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:08,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:08,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 05:09:08,829 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,SelfDestructingSolverStorable179 [2022-01-18 05:09:08,829 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash 836691451, now seen corresponding path program 164 times [2022-01-18 05:09:08,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:08,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787603834] [2022-01-18 05:09:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:08,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:08,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787603834] [2022-01-18 05:09:08,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787603834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326017315] [2022-01-18 05:09:08,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:08,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:08,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:08,924 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) [2022-01-18 05:09:08,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 05:09:09,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:09,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:09,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:09,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:09:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:09,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:09,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:09,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:09,598 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:09,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:09,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:09,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326017315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:09,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:09,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:09,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109263068] [2022-01-18 05:09:09,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:09,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:09,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:09,605 INFO L87 Difference]: Start difference. First operand 489 states and 1477 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:10,007 INFO L93 Difference]: Finished difference Result 812 states and 2359 transitions. [2022-01-18 05:09:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:10,008 INFO L225 Difference]: With dead ends: 812 [2022-01-18 05:09:10,008 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 05:09:10,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:09:10,009 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:10,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 203 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:10,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 05:09:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 498. [2022-01-18 05:09:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.0181086519114686) internal successors, (1500), 497 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1500 transitions. [2022-01-18 05:09:10,015 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1500 transitions. Word has length 22 [2022-01-18 05:09:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:10,015 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1500 transitions. [2022-01-18 05:09:10,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1500 transitions. [2022-01-18 05:09:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:10,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:10,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:10,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 05:09:10,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:10,216 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1963672881, now seen corresponding path program 165 times [2022-01-18 05:09:10,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:10,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877532820] [2022-01-18 05:09:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:10,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:10,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:10,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877532820] [2022-01-18 05:09:10,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877532820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:10,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95014693] [2022-01-18 05:09:10,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:10,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:10,292 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) [2022-01-18 05:09:10,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 05:09:10,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:10,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:10,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:10,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:09:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:10,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:10,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:10,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:10,911 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:10,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:10,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:10,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95014693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:10,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:10,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:10,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274309730] [2022-01-18 05:09:10,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:10,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:10,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:10,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:10,918 INFO L87 Difference]: Start difference. First operand 498 states and 1500 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:11,508 INFO L93 Difference]: Finished difference Result 824 states and 2378 transitions. [2022-01-18 05:09:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:09:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:11,510 INFO L225 Difference]: With dead ends: 824 [2022-01-18 05:09:11,510 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 05:09:11,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:09:11,511 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 195 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:11,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 236 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 05:09:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 495. [2022-01-18 05:09:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.0121457489878543) internal successors, (1488), 494 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1488 transitions. [2022-01-18 05:09:11,518 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1488 transitions. Word has length 22 [2022-01-18 05:09:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:11,518 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1488 transitions. [2022-01-18 05:09:11,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1488 transitions. [2022-01-18 05:09:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:11,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:11,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:11,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:11,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:11,719 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:11,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1538725671, now seen corresponding path program 166 times [2022-01-18 05:09:11,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:11,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672915868] [2022-01-18 05:09:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:11,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:11,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:11,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672915868] [2022-01-18 05:09:11,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672915868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:11,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814435688] [2022-01-18 05:09:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:11,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:11,787 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) [2022-01-18 05:09:11,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 05:09:11,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:11,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:11,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:12,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:12,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:12,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:12,374 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:12,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:12,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814435688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:12,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:12,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:12,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076052756] [2022-01-18 05:09:12,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:12,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:12,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:12,381 INFO L87 Difference]: Start difference. First operand 495 states and 1488 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:12,776 INFO L93 Difference]: Finished difference Result 821 states and 2389 transitions. [2022-01-18 05:09:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:12,778 INFO L225 Difference]: With dead ends: 821 [2022-01-18 05:09:12,778 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 05:09:12,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:09:12,778 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:12,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 190 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 05:09:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 492. [2022-01-18 05:09:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 3.0061099796334014) internal successors, (1476), 491 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1476 transitions. [2022-01-18 05:09:12,784 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1476 transitions. Word has length 22 [2022-01-18 05:09:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:12,784 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1476 transitions. [2022-01-18 05:09:12,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1476 transitions. [2022-01-18 05:09:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:12,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:12,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:12,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 05:09:12,985 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,SelfDestructingSolverStorable182 [2022-01-18 05:09:12,986 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash 232870889, now seen corresponding path program 167 times [2022-01-18 05:09:12,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067407611] [2022-01-18 05:09:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:12,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:13,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:13,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067407611] [2022-01-18 05:09:13,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067407611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:13,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840930671] [2022-01-18 05:09:13,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:13,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:13,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:13,049 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) [2022-01-18 05:09:13,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 05:09:13,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:13,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:13,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:13,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:13,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:13,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:13,646 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:13,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:13,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:13,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840930671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:13,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:13,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:13,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383195358] [2022-01-18 05:09:13,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:13,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:13,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:13,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:13,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:13,653 INFO L87 Difference]: Start difference. First operand 492 states and 1476 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:13,991 INFO L93 Difference]: Finished difference Result 749 states and 2181 transitions. [2022-01-18 05:09:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:13,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:13,992 INFO L225 Difference]: With dead ends: 749 [2022-01-18 05:09:13,992 INFO L226 Difference]: Without dead ends: 713 [2022-01-18 05:09:13,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:13,993 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:13,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 198 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-18 05:09:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 466. [2022-01-18 05:09:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0086021505376346) internal successors, (1399), 465 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1399 transitions. [2022-01-18 05:09:13,998 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1399 transitions. Word has length 22 [2022-01-18 05:09:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:13,998 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1399 transitions. [2022-01-18 05:09:13,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1399 transitions. [2022-01-18 05:09:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:13,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:13,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:14,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-18 05:09:14,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:14,218 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1000298955, now seen corresponding path program 168 times [2022-01-18 05:09:14,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:14,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212020647] [2022-01-18 05:09:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:14,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:14,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212020647] [2022-01-18 05:09:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212020647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562125847] [2022-01-18 05:09:14,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:14,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:14,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:14,295 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) [2022-01-18 05:09:14,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 05:09:14,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:09:14,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:14,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:14,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:09:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:14,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:14,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:14,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:14,919 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:14,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:14,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:14,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562125847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:14,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:14,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:14,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161745652] [2022-01-18 05:09:14,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:14,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:14,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:14,926 INFO L87 Difference]: Start difference. First operand 466 states and 1399 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:15,235 INFO L93 Difference]: Finished difference Result 695 states and 2046 transitions. [2022-01-18 05:09:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:15,236 INFO L225 Difference]: With dead ends: 695 [2022-01-18 05:09:15,236 INFO L226 Difference]: Without dead ends: 695 [2022-01-18 05:09:15,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:15,236 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:15,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 192 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-18 05:09:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 475. [2022-01-18 05:09:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.021097046413502) internal successors, (1432), 474 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1432 transitions. [2022-01-18 05:09:15,242 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1432 transitions. Word has length 22 [2022-01-18 05:09:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:15,242 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1432 transitions. [2022-01-18 05:09:15,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1432 transitions. [2022-01-18 05:09:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:15,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:15,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:15,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-01-18 05:09:15,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:15,443 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:15,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1800065377, now seen corresponding path program 169 times [2022-01-18 05:09:15,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:15,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553210798] [2022-01-18 05:09:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:15,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:15,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553210798] [2022-01-18 05:09:15,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553210798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390031536] [2022-01-18 05:09:15,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:15,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:15,519 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) [2022-01-18 05:09:15,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 05:09:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:15,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:09:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:15,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:15,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:15,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:16,155 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:16,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:16,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:16,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390031536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:16,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:16,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:16,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32153831] [2022-01-18 05:09:16,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:16,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:16,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:16,162 INFO L87 Difference]: Start difference. First operand 475 states and 1432 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:16,483 INFO L93 Difference]: Finished difference Result 724 states and 2127 transitions. [2022-01-18 05:09:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:16,484 INFO L225 Difference]: With dead ends: 724 [2022-01-18 05:09:16,484 INFO L226 Difference]: Without dead ends: 714 [2022-01-18 05:09:16,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:16,484 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 173 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:16,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 159 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-18 05:09:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 472. [2022-01-18 05:09:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.0148619957537157) internal successors, (1420), 471 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1420 transitions. [2022-01-18 05:09:16,490 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1420 transitions. Word has length 22 [2022-01-18 05:09:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:16,490 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1420 transitions. [2022-01-18 05:09:16,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1420 transitions. [2022-01-18 05:09:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:16,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:16,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:16,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 05:09:16,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:16,691 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1375118167, now seen corresponding path program 170 times [2022-01-18 05:09:16,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:16,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784004707] [2022-01-18 05:09:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:16,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:16,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784004707] [2022-01-18 05:09:16,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784004707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460116939] [2022-01-18 05:09:16,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:16,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:16,783 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) [2022-01-18 05:09:16,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 05:09:17,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:17,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:17,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:17,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:17,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:17,422 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:17,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:17,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:17,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460116939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:17,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:17,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:17,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374466662] [2022-01-18 05:09:17,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:17,429 INFO L87 Difference]: Start difference. First operand 472 states and 1420 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:17,747 INFO L93 Difference]: Finished difference Result 672 states and 1987 transitions. [2022-01-18 05:09:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:17,748 INFO L225 Difference]: With dead ends: 672 [2022-01-18 05:09:17,748 INFO L226 Difference]: Without dead ends: 652 [2022-01-18 05:09:17,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:17,749 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:17,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 188 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-18 05:09:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 469. [2022-01-18 05:09:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0085470085470085) internal successors, (1408), 468 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1408 transitions. [2022-01-18 05:09:17,755 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1408 transitions. Word has length 22 [2022-01-18 05:09:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:17,755 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1408 transitions. [2022-01-18 05:09:17,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1408 transitions. [2022-01-18 05:09:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:17,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:17,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:17,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 05:09:17,967 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,SelfDestructingSolverStorable186 [2022-01-18 05:09:17,967 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1214196745, now seen corresponding path program 171 times [2022-01-18 05:09:17,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:17,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993867598] [2022-01-18 05:09:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:17,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:18,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993867598] [2022-01-18 05:09:18,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993867598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:18,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360973815] [2022-01-18 05:09:18,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:18,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:18,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:18,061 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) [2022-01-18 05:09:18,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 05:09:18,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:18,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:18,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:18,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:18,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:09:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:18,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:18,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:18,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:18,661 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:18,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:18,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:18,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360973815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:18,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:18,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:18,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119724459] [2022-01-18 05:09:18,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:18,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:18,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:18,668 INFO L87 Difference]: Start difference. First operand 469 states and 1408 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:18,993 INFO L93 Difference]: Finished difference Result 787 states and 2296 transitions. [2022-01-18 05:09:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:09:18,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:18,994 INFO L225 Difference]: With dead ends: 787 [2022-01-18 05:09:18,994 INFO L226 Difference]: Without dead ends: 787 [2022-01-18 05:09:18,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:09:18,995 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 175 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:18,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 196 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-18 05:09:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 481. [2022-01-18 05:09:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.033333333333333) internal successors, (1456), 480 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1456 transitions. [2022-01-18 05:09:19,002 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1456 transitions. Word has length 22 [2022-01-18 05:09:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:19,002 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1456 transitions. [2022-01-18 05:09:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1456 transitions. [2022-01-18 05:09:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:19,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:19,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:19,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-18 05:09:19,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:19,212 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 280406219, now seen corresponding path program 172 times [2022-01-18 05:09:19,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:19,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943085135] [2022-01-18 05:09:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:19,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:19,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:19,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943085135] [2022-01-18 05:09:19,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943085135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:19,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711145268] [2022-01-18 05:09:19,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:19,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:19,291 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) [2022-01-18 05:09:19,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 05:09:19,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:19,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:19,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:19,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:09:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:19,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:19,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:19,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:19,876 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:19,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:19,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:19,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711145268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:19,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:19,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:19,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370240480] [2022-01-18 05:09:19,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:19,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:19,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:19,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:19,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:19,886 INFO L87 Difference]: Start difference. First operand 481 states and 1456 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:20,184 INFO L93 Difference]: Finished difference Result 729 states and 2147 transitions. [2022-01-18 05:09:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:20,186 INFO L225 Difference]: With dead ends: 729 [2022-01-18 05:09:20,186 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 05:09:20,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:09:20,186 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:20,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 206 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 05:09:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 488. [2022-01-18 05:09:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.0184804928131417) internal successors, (1470), 487 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1470 transitions. [2022-01-18 05:09:20,192 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1470 transitions. Word has length 22 [2022-01-18 05:09:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:20,192 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1470 transitions. [2022-01-18 05:09:20,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1470 transitions. [2022-01-18 05:09:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:20,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:20,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:20,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 05:09:20,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:20,396 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash -38706101, now seen corresponding path program 173 times [2022-01-18 05:09:20,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:20,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616530096] [2022-01-18 05:09:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:20,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:20,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:20,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616530096] [2022-01-18 05:09:20,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616530096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:20,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562310432] [2022-01-18 05:09:20,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:20,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:20,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:20,481 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) [2022-01-18 05:09:20,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 05:09:20,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:20,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:20,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:20,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:21,077 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:21,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:21,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:21,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562310432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:21,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:21,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:21,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096743701] [2022-01-18 05:09:21,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:21,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:21,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:21,084 INFO L87 Difference]: Start difference. First operand 488 states and 1470 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:21,335 INFO L93 Difference]: Finished difference Result 654 states and 1943 transitions. [2022-01-18 05:09:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:21,336 INFO L225 Difference]: With dead ends: 654 [2022-01-18 05:09:21,336 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 05:09:21,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:09:21,337 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:21,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 152 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 05:09:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 460. [2022-01-18 05:09:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.008714596949891) internal successors, (1381), 459 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1381 transitions. [2022-01-18 05:09:21,342 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1381 transitions. Word has length 22 [2022-01-18 05:09:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:21,342 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1381 transitions. [2022-01-18 05:09:21,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1381 transitions. [2022-01-18 05:09:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:21,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:21,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:21,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 05:09:21,543 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,SelfDestructingSolverStorable189 [2022-01-18 05:09:21,544 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1499669411, now seen corresponding path program 174 times [2022-01-18 05:09:21,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026092937] [2022-01-18 05:09:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:21,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:21,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:21,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026092937] [2022-01-18 05:09:21,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026092937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:21,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074866541] [2022-01-18 05:09:21,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:21,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:21,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:21,627 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) [2022-01-18 05:09:21,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 05:09:21,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:21,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:21,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:22,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:09:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:22,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:22,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:22,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:22,393 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:22,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:22,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:22,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074866541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:22,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:22,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:22,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552235582] [2022-01-18 05:09:22,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:22,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:22,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:22,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:22,401 INFO L87 Difference]: Start difference. First operand 460 states and 1381 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:22,711 INFO L93 Difference]: Finished difference Result 670 states and 1970 transitions. [2022-01-18 05:09:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:22,712 INFO L225 Difference]: With dead ends: 670 [2022-01-18 05:09:22,712 INFO L226 Difference]: Without dead ends: 670 [2022-01-18 05:09:22,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:22,713 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:22,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 176 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-18 05:09:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 470. [2022-01-18 05:09:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.029850746268657) internal successors, (1421), 469 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1421 transitions. [2022-01-18 05:09:22,718 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1421 transitions. Word has length 22 [2022-01-18 05:09:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:22,718 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1421 transitions. [2022-01-18 05:09:22,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1421 transitions. [2022-01-18 05:09:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:22,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:22,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:22,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 05:09:22,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 05:09:22,921 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:22,922 INFO L85 PathProgramCache]: Analyzing trace with hash -5066447, now seen corresponding path program 175 times [2022-01-18 05:09:22,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025285895] [2022-01-18 05:09:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:22,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:23,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:23,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025285895] [2022-01-18 05:09:23,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025285895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:23,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214871272] [2022-01-18 05:09:23,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:23,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:23,008 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) [2022-01-18 05:09:23,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 05:09:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:23,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:23,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:23,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 05:09:23,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 05:09:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:23,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:23,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:23,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:23,754 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:23,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:23,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:23,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214871272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:23,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:23,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:23,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435134710] [2022-01-18 05:09:23,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:23,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:23,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:23,761 INFO L87 Difference]: Start difference. First operand 470 states and 1421 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:24,203 INFO L93 Difference]: Finished difference Result 699 states and 2051 transitions. [2022-01-18 05:09:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:24,205 INFO L225 Difference]: With dead ends: 699 [2022-01-18 05:09:24,205 INFO L226 Difference]: Without dead ends: 689 [2022-01-18 05:09:24,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:09:24,205 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:24,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 236 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-18 05:09:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 467. [2022-01-18 05:09:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.023605150214592) internal successors, (1409), 466 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1409 transitions. [2022-01-18 05:09:24,211 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1409 transitions. Word has length 22 [2022-01-18 05:09:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:24,212 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1409 transitions. [2022-01-18 05:09:24,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1409 transitions. [2022-01-18 05:09:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:24,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:24,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:24,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 05:09:24,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:24,414 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash 419880763, now seen corresponding path program 176 times [2022-01-18 05:09:24,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:24,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374594235] [2022-01-18 05:09:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:24,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:24,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374594235] [2022-01-18 05:09:24,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374594235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671968281] [2022-01-18 05:09:24,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:24,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:24,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:24,492 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) [2022-01-18 05:09:24,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 05:09:24,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:24,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:24,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:24,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:24,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:24,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:25,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:25,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:25,219 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:25,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:25,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:25,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671968281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:25,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:25,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:25,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224641319] [2022-01-18 05:09:25,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:25,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:25,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:25,226 INFO L87 Difference]: Start difference. First operand 467 states and 1409 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:25,582 INFO L93 Difference]: Finished difference Result 657 states and 1937 transitions. [2022-01-18 05:09:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:25,583 INFO L225 Difference]: With dead ends: 657 [2022-01-18 05:09:25,583 INFO L226 Difference]: Without dead ends: 637 [2022-01-18 05:09:25,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:25,583 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:25,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 181 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-18 05:09:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 464. [2022-01-18 05:09:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.0172786177105833) internal successors, (1397), 463 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1397 transitions. [2022-01-18 05:09:25,591 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1397 transitions. Word has length 22 [2022-01-18 05:09:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:25,591 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1397 transitions. [2022-01-18 05:09:25,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1397 transitions. [2022-01-18 05:09:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:25,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:25,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:25,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:25,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:25,815 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash -203057903, now seen corresponding path program 177 times [2022-01-18 05:09:25,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:25,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742944245] [2022-01-18 05:09:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:25,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:25,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742944245] [2022-01-18 05:09:25,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742944245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045077930] [2022-01-18 05:09:25,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:25,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:25,906 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) [2022-01-18 05:09:25,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 05:09:26,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:26,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:26,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:26,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:26,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 05:09:26,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 05:09:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:26,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:26,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:26,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:26,662 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:26,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:26,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:26,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045077930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:26,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:26,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:26,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552508685] [2022-01-18 05:09:26,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:26,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:26,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:26,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:26,670 INFO L87 Difference]: Start difference. First operand 464 states and 1397 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:27,033 INFO L93 Difference]: Finished difference Result 788 states and 2306 transitions. [2022-01-18 05:09:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:09:27,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:27,035 INFO L225 Difference]: With dead ends: 788 [2022-01-18 05:09:27,035 INFO L226 Difference]: Without dead ends: 788 [2022-01-18 05:09:27,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:09:27,035 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 233 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:27,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 177 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-18 05:09:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 474. [2022-01-18 05:09:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.0528541226215644) internal successors, (1444), 473 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1444 transitions. [2022-01-18 05:09:27,044 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1444 transitions. Word has length 22 [2022-01-18 05:09:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:27,044 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1444 transitions. [2022-01-18 05:09:27,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1444 transitions. [2022-01-18 05:09:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:27,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:27,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:27,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:27,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:27,259 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1291545061, now seen corresponding path program 178 times [2022-01-18 05:09:27,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:27,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258182221] [2022-01-18 05:09:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:27,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:27,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258182221] [2022-01-18 05:09:27,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258182221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301801430] [2022-01-18 05:09:27,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:27,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:27,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:27,354 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) [2022-01-18 05:09:27,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 05:09:27,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:27,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:27,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:27,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:27,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-01-18 05:09:27,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 05:09:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:27,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:27,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:27,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:28,078 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:28,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:28,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:28,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301801430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:28,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:28,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:28,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33997425] [2022-01-18 05:09:28,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:28,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:28,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:28,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:28,086 INFO L87 Difference]: Start difference. First operand 474 states and 1444 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:28,530 INFO L93 Difference]: Finished difference Result 841 states and 2445 transitions. [2022-01-18 05:09:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:28,532 INFO L225 Difference]: With dead ends: 841 [2022-01-18 05:09:28,532 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 05:09:28,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:09:28,533 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:28,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 185 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 05:09:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 481. [2022-01-18 05:09:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0375) internal successors, (1458), 480 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1458 transitions. [2022-01-18 05:09:28,541 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1458 transitions. Word has length 22 [2022-01-18 05:09:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:28,541 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1458 transitions. [2022-01-18 05:09:28,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1458 transitions. [2022-01-18 05:09:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:28,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:28,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:28,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 05:09:28,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 05:09:28,742 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1962347043, now seen corresponding path program 179 times [2022-01-18 05:09:28,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:28,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679229768] [2022-01-18 05:09:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:28,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:28,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679229768] [2022-01-18 05:09:28,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679229768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648864809] [2022-01-18 05:09:28,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:28,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:28,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:28,828 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) [2022-01-18 05:09:28,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 05:09:29,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:09:29,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:29,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:29,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:29,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:29,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:09:29,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:09:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:29,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:29,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:29,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:29,546 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:29,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:29,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:29,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648864809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:29,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:29,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:29,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981466651] [2022-01-18 05:09:29,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:29,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:29,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:29,553 INFO L87 Difference]: Start difference. First operand 481 states and 1458 transitions. Second operand has 23 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) [2022-01-18 05:09:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:29,901 INFO L93 Difference]: Finished difference Result 871 states and 2487 transitions. [2022-01-18 05:09:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:09:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:09:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:29,902 INFO L225 Difference]: With dead ends: 871 [2022-01-18 05:09:29,902 INFO L226 Difference]: Without dead ends: 871 [2022-01-18 05:09:29,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:09:29,903 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:29,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 173 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-18 05:09:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 462. [2022-01-18 05:09:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0108459869848154) internal successors, (1388), 461 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1388 transitions. [2022-01-18 05:09:29,909 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1388 transitions. Word has length 22 [2022-01-18 05:09:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:29,909 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1388 transitions. [2022-01-18 05:09:29,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:09:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1388 transitions. [2022-01-18 05:09:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:29,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:29,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:29,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:30,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:30,110 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash 255790949, now seen corresponding path program 180 times [2022-01-18 05:09:30,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:30,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119472178] [2022-01-18 05:09:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:30,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:30,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:30,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119472178] [2022-01-18 05:09:30,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119472178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400934442] [2022-01-18 05:09:30,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:30,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:30,197 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) [2022-01-18 05:09:30,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 05:09:30,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:09:30,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:30,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:30,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:09:30,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:09:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:30,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:30,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:30,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:30,995 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:30,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:30,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:31,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400934442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:31,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:31,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:31,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769602994] [2022-01-18 05:09:31,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:31,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:31,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:31,003 INFO L87 Difference]: Start difference. First operand 462 states and 1388 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:31,293 INFO L93 Difference]: Finished difference Result 720 states and 2085 transitions. [2022-01-18 05:09:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:31,294 INFO L225 Difference]: With dead ends: 720 [2022-01-18 05:09:31,294 INFO L226 Difference]: Without dead ends: 711 [2022-01-18 05:09:31,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:31,295 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:31,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 168 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-01-18 05:09:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 478. [2022-01-18 05:09:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.029350104821803) internal successors, (1445), 477 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1445 transitions. [2022-01-18 05:09:31,300 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1445 transitions. Word has length 22 [2022-01-18 05:09:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:31,300 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1445 transitions. [2022-01-18 05:09:31,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1445 transitions. [2022-01-18 05:09:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:31,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:31,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:31,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-18 05:09:31,501 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,SelfDestructingSolverStorable196 [2022-01-18 05:09:31,501 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash 598040443, now seen corresponding path program 181 times [2022-01-18 05:09:31,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:31,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741281233] [2022-01-18 05:09:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:31,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:31,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741281233] [2022-01-18 05:09:31,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741281233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605112815] [2022-01-18 05:09:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:31,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:31,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:31,582 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) [2022-01-18 05:09:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 05:09:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:31,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:31,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:31,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:31,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 05:09:31,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-18 05:09:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:32,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:32,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:32,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:32,275 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:32,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:32,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:32,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605112815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:32,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:32,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:32,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651000903] [2022-01-18 05:09:32,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:32,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:32,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:32,283 INFO L87 Difference]: Start difference. First operand 478 states and 1445 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:32,867 INFO L93 Difference]: Finished difference Result 832 states and 2364 transitions. [2022-01-18 05:09:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:32,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:32,868 INFO L225 Difference]: With dead ends: 832 [2022-01-18 05:09:32,868 INFO L226 Difference]: Without dead ends: 822 [2022-01-18 05:09:32,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:09:32,869 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:32,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 303 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-01-18 05:09:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 500. [2022-01-18 05:09:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.024048096192385) internal successors, (1509), 499 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1509 transitions. [2022-01-18 05:09:32,886 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1509 transitions. Word has length 22 [2022-01-18 05:09:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:32,886 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1509 transitions. [2022-01-18 05:09:32,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1509 transitions. [2022-01-18 05:09:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:32,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:32,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:32,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 05:09:33,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:33,088 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash -982731473, now seen corresponding path program 182 times [2022-01-18 05:09:33,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:33,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022106667] [2022-01-18 05:09:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:33,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:33,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022106667] [2022-01-18 05:09:33,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022106667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181842660] [2022-01-18 05:09:33,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:33,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:33,167 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) [2022-01-18 05:09:33,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 05:09:33,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:33,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:33,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:33,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:33,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:33,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 05:09:33,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 05:09:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:33,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:33,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:33,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:33,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:33,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:33,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:33,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181842660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:33,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:33,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:33,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606076854] [2022-01-18 05:09:33,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:33,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:33,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:33,842 INFO L87 Difference]: Start difference. First operand 500 states and 1509 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:34,265 INFO L93 Difference]: Finished difference Result 789 states and 2253 transitions. [2022-01-18 05:09:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:09:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:34,267 INFO L225 Difference]: With dead ends: 789 [2022-01-18 05:09:34,267 INFO L226 Difference]: Without dead ends: 777 [2022-01-18 05:09:34,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:34,267 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 148 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:34,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 222 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-18 05:09:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 480. [2022-01-18 05:09:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0250521920668056) internal successors, (1449), 479 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1449 transitions. [2022-01-18 05:09:34,274 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1449 transitions. Word has length 22 [2022-01-18 05:09:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:34,274 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1449 transitions. [2022-01-18 05:09:34,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1449 transitions. [2022-01-18 05:09:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:34,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:34,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:34,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 05:09:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:34,475 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash 396074085, now seen corresponding path program 183 times [2022-01-18 05:09:34,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:34,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138784208] [2022-01-18 05:09:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:34,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:34,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138784208] [2022-01-18 05:09:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138784208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330395317] [2022-01-18 05:09:34,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:34,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:34,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:34,550 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) [2022-01-18 05:09:34,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 05:09:34,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:09:34,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:34,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:34,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:35,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:35,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:35,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:35,287 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:35,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:35,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:35,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330395317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:35,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:35,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:35,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945760078] [2022-01-18 05:09:35,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:35,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:35,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:35,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:35,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:35,294 INFO L87 Difference]: Start difference. First operand 480 states and 1449 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:35,652 INFO L93 Difference]: Finished difference Result 639 states and 1885 transitions. [2022-01-18 05:09:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:35,653 INFO L225 Difference]: With dead ends: 639 [2022-01-18 05:09:35,653 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 05:09:35,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:35,653 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:35,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 171 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 05:09:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 486. [2022-01-18 05:09:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0144329896907216) internal successors, (1462), 485 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1462 transitions. [2022-01-18 05:09:35,669 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1462 transitions. Word has length 22 [2022-01-18 05:09:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:35,669 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1462 transitions. [2022-01-18 05:09:35,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1462 transitions. [2022-01-18 05:09:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:35,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:35,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:35,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 05:09:35,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 05:09:35,870 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:35,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1363215055, now seen corresponding path program 184 times [2022-01-18 05:09:35,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:35,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982936147] [2022-01-18 05:09:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:35,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:35,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982936147] [2022-01-18 05:09:35,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982936147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514512666] [2022-01-18 05:09:35,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:35,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:35,944 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) [2022-01-18 05:09:35,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 05:09:36,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:36,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:36,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:36,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-18 05:09:36,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-01-18 05:09:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:36,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:36,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:36,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:36,680 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:36,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:36,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:36,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514512666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:36,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:36,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:36,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090404508] [2022-01-18 05:09:36,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:36,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:36,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:36,688 INFO L87 Difference]: Start difference. First operand 486 states and 1462 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:37,082 INFO L93 Difference]: Finished difference Result 717 states and 2063 transitions. [2022-01-18 05:09:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:09:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:37,084 INFO L225 Difference]: With dead ends: 717 [2022-01-18 05:09:37,084 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 05:09:37,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:37,084 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 188 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:37,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 174 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 05:09:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 508. [2022-01-18 05:09:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.009861932938856) internal successors, (1526), 507 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1526 transitions. [2022-01-18 05:09:37,090 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1526 transitions. Word has length 22 [2022-01-18 05:09:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:37,090 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1526 transitions. [2022-01-18 05:09:37,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1526 transitions. [2022-01-18 05:09:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:37,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:37,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:37,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:37,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 05:09:37,311 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1350980325, now seen corresponding path program 185 times [2022-01-18 05:09:37,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:37,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43196004] [2022-01-18 05:09:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:37,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:37,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43196004] [2022-01-18 05:09:37,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43196004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77805271] [2022-01-18 05:09:37,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:37,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:37,387 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) [2022-01-18 05:09:37,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 05:09:37,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:09:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:37,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-01-18 05:09:37,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-18 05:09:37,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-01-18 05:09:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:37,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:37,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:37,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:09:38,030 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:38,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:38,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:38,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77805271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:38,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:38,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:38,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563765572] [2022-01-18 05:09:38,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:38,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:38,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:38,037 INFO L87 Difference]: Start difference. First operand 508 states and 1526 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:38,395 INFO L93 Difference]: Finished difference Result 674 states and 1952 transitions. [2022-01-18 05:09:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:38,396 INFO L225 Difference]: With dead ends: 674 [2022-01-18 05:09:38,397 INFO L226 Difference]: Without dead ends: 659 [2022-01-18 05:09:38,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:38,397 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:38,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 175 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-18 05:09:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 482. [2022-01-18 05:09:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0207900207900207) internal successors, (1453), 481 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1453 transitions. [2022-01-18 05:09:38,402 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1453 transitions. Word has length 22 [2022-01-18 05:09:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:38,402 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1453 transitions. [2022-01-18 05:09:38,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1453 transitions. [2022-01-18 05:09:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:38,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:38,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:38,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 05:09:38,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:38,604 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -24051833, now seen corresponding path program 186 times [2022-01-18 05:09:38,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945564192] [2022-01-18 05:09:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:38,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:38,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945564192] [2022-01-18 05:09:38,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945564192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810174263] [2022-01-18 05:09:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:38,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:38,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:38,696 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) [2022-01-18 05:09:38,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 05:09:38,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:38,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:39,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:09:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:39,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:39,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:39,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:39,364 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:39,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:39,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:39,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810174263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:39,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:39,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:39,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804929553] [2022-01-18 05:09:39,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:39,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:39,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:39,371 INFO L87 Difference]: Start difference. First operand 482 states and 1453 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:39,696 INFO L93 Difference]: Finished difference Result 653 states and 1905 transitions. [2022-01-18 05:09:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:39,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:39,697 INFO L225 Difference]: With dead ends: 653 [2022-01-18 05:09:39,697 INFO L226 Difference]: Without dead ends: 653 [2022-01-18 05:09:39,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:39,698 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:39,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 198 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-18 05:09:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 485. [2022-01-18 05:09:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.010330578512397) internal successors, (1457), 484 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1457 transitions. [2022-01-18 05:09:39,703 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1457 transitions. Word has length 22 [2022-01-18 05:09:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:39,703 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1457 transitions. [2022-01-18 05:09:39,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1457 transitions. [2022-01-18 05:09:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:39,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:39,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:39,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:39,904 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,SelfDestructingSolverStorable202 [2022-01-18 05:09:39,905 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1470551131, now seen corresponding path program 187 times [2022-01-18 05:09:39,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:39,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848034038] [2022-01-18 05:09:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:39,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:39,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848034038] [2022-01-18 05:09:39,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848034038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646911287] [2022-01-18 05:09:39,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:39,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:39,987 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) [2022-01-18 05:09:39,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 05:09:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:40,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:09:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:40,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:40,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:40,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:40,633 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:40,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:40,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:40,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646911287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:40,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:40,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:40,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010354368] [2022-01-18 05:09:40,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:40,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:40,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:40,640 INFO L87 Difference]: Start difference. First operand 485 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:41,008 INFO L93 Difference]: Finished difference Result 682 states and 1983 transitions. [2022-01-18 05:09:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:41,009 INFO L225 Difference]: With dead ends: 682 [2022-01-18 05:09:41,009 INFO L226 Difference]: Without dead ends: 672 [2022-01-18 05:09:41,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:41,009 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:41,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 203 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-18 05:09:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 482. [2022-01-18 05:09:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.004158004158004) internal successors, (1445), 481 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1445 transitions. [2022-01-18 05:09:41,015 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1445 transitions. Word has length 22 [2022-01-18 05:09:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:41,016 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1445 transitions. [2022-01-18 05:09:41,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1445 transitions. [2022-01-18 05:09:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:41,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:41,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:41,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 05:09:41,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:41,235 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1895498341, now seen corresponding path program 188 times [2022-01-18 05:09:41,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:41,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192259156] [2022-01-18 05:09:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:41,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:41,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:41,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192259156] [2022-01-18 05:09:41,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192259156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:41,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761933705] [2022-01-18 05:09:41,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:41,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:41,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:41,311 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) [2022-01-18 05:09:41,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 05:09:41,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:41,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:41,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:41,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:09:41,956 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:41,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:41,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761933705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:41,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91201486] [2022-01-18 05:09:41,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:41,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:41,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:41,963 INFO L87 Difference]: Start difference. First operand 482 states and 1445 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:42,316 INFO L93 Difference]: Finished difference Result 630 states and 1855 transitions. [2022-01-18 05:09:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:42,317 INFO L225 Difference]: With dead ends: 630 [2022-01-18 05:09:42,318 INFO L226 Difference]: Without dead ends: 610 [2022-01-18 05:09:42,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:42,318 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:42,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 214 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-18 05:09:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2022-01-18 05:09:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.0086393088552916) internal successors, (1393), 463 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1393 transitions. [2022-01-18 05:09:42,324 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1393 transitions. Word has length 22 [2022-01-18 05:09:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:42,324 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1393 transitions. [2022-01-18 05:09:42,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1393 transitions. [2022-01-18 05:09:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:42,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:42,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:42,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-18 05:09:42,528 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,SelfDestructingSolverStorable204 [2022-01-18 05:09:42,528 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash -59659887, now seen corresponding path program 189 times [2022-01-18 05:09:42,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:42,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230606170] [2022-01-18 05:09:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:42,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:42,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230606170] [2022-01-18 05:09:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230606170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135680649] [2022-01-18 05:09:42,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:42,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:42,616 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) [2022-01-18 05:09:42,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 05:09:42,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:42,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:42,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:09:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:43,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:43,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:43,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:43,279 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:43,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:43,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:43,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135680649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:43,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:43,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:43,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044288835] [2022-01-18 05:09:43,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:43,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:43,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:43,286 INFO L87 Difference]: Start difference. First operand 464 states and 1393 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:43,597 INFO L93 Difference]: Finished difference Result 712 states and 2089 transitions. [2022-01-18 05:09:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:43,599 INFO L225 Difference]: With dead ends: 712 [2022-01-18 05:09:43,599 INFO L226 Difference]: Without dead ends: 712 [2022-01-18 05:09:43,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:09:43,599 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:43,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 186 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-18 05:09:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 476. [2022-01-18 05:09:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.033684210526316) internal successors, (1441), 475 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1441 transitions. [2022-01-18 05:09:43,605 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1441 transitions. Word has length 22 [2022-01-18 05:09:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:43,605 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1441 transitions. [2022-01-18 05:09:43,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1441 transitions. [2022-01-18 05:09:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:43,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:43,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:43,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 05:09:43,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:43,806 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1434943077, now seen corresponding path program 190 times [2022-01-18 05:09:43,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642586680] [2022-01-18 05:09:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:43,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:43,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:43,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642586680] [2022-01-18 05:09:43,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642586680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:43,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712141566] [2022-01-18 05:09:43,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:43,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:43,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:43,893 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) [2022-01-18 05:09:43,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 05:09:44,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:44,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:09:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:44,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:44,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:44,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:44,547 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:44,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:44,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:44,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712141566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:44,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:44,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:44,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343662682] [2022-01-18 05:09:44,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:44,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:44,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:44,554 INFO L87 Difference]: Start difference. First operand 476 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:44,854 INFO L93 Difference]: Finished difference Result 687 states and 2021 transitions. [2022-01-18 05:09:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:44,855 INFO L225 Difference]: With dead ends: 687 [2022-01-18 05:09:44,855 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 05:09:44,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:09:44,856 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:44,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 198 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 05:09:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 483. [2022-01-18 05:09:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0186721991701244) internal successors, (1455), 482 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1455 transitions. [2022-01-18 05:09:44,861 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1455 transitions. Word has length 22 [2022-01-18 05:09:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:44,861 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1455 transitions. [2022-01-18 05:09:44,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1455 transitions. [2022-01-18 05:09:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:44,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:44,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:44,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 05:09:45,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:45,062 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1115830757, now seen corresponding path program 191 times [2022-01-18 05:09:45,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:45,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670640911] [2022-01-18 05:09:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:45,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:45,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670640911] [2022-01-18 05:09:45,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670640911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664921669] [2022-01-18 05:09:45,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:45,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:45,153 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) [2022-01-18 05:09:45,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 05:09:45,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:45,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:45,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:45,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:45,811 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:45,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:45,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:45,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664921669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:45,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:45,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:45,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979314867] [2022-01-18 05:09:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:45,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:45,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:45,818 INFO L87 Difference]: Start difference. First operand 483 states and 1455 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:46,039 INFO L93 Difference]: Finished difference Result 612 states and 1817 transitions. [2022-01-18 05:09:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:46,040 INFO L225 Difference]: With dead ends: 612 [2022-01-18 05:09:46,040 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 05:09:46,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:09:46,040 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:46,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 113 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 05:09:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 461. [2022-01-18 05:09:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.008695652173913) internal successors, (1384), 460 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1384 transitions. [2022-01-18 05:09:46,045 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1384 transitions. Word has length 22 [2022-01-18 05:09:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:46,045 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1384 transitions. [2022-01-18 05:09:46,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1384 transitions. [2022-01-18 05:09:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:46,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:46,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:46,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 05:09:46,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:46,247 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1546790043, now seen corresponding path program 192 times [2022-01-18 05:09:46,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:46,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200253720] [2022-01-18 05:09:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:46,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:46,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:46,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200253720] [2022-01-18 05:09:46,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200253720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:46,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906165832] [2022-01-18 05:09:46,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:46,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:46,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:46,343 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) [2022-01-18 05:09:46,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 05:09:46,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:46,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:46,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:46,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:09:46,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:09:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:46,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:47,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:47,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:47,136 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:47,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:47,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:47,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906165832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:47,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:47,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:47,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908945928] [2022-01-18 05:09:47,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:47,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:47,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:47,143 INFO L87 Difference]: Start difference. First operand 461 states and 1384 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:47,574 INFO L93 Difference]: Finished difference Result 868 states and 2508 transitions. [2022-01-18 05:09:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:47,575 INFO L225 Difference]: With dead ends: 868 [2022-01-18 05:09:47,575 INFO L226 Difference]: Without dead ends: 868 [2022-01-18 05:09:47,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:09:47,575 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:47,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 220 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-18 05:09:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 475. [2022-01-18 05:09:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.0527426160337554) internal successors, (1447), 474 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1447 transitions. [2022-01-18 05:09:47,581 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1447 transitions. Word has length 22 [2022-01-18 05:09:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:47,582 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1447 transitions. [2022-01-18 05:09:47,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1447 transitions. [2022-01-18 05:09:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:47,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:47,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:47,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 05:09:47,782 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,SelfDestructingSolverStorable208 [2022-01-18 05:09:47,783 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash -52187079, now seen corresponding path program 193 times [2022-01-18 05:09:47,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:47,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221113604] [2022-01-18 05:09:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:47,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:47,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:47,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221113604] [2022-01-18 05:09:47,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221113604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:47,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219501184] [2022-01-18 05:09:47,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:47,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:47,869 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) [2022-01-18 05:09:47,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 05:09:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:48,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:48,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-01-18 05:09:48,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-18 05:09:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:48,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:48,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:48,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:48,594 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:48,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:48,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:48,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219501184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:48,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:48,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:48,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952992341] [2022-01-18 05:09:48,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:48,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:48,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:48,601 INFO L87 Difference]: Start difference. First operand 475 states and 1447 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:49,056 INFO L93 Difference]: Finished difference Result 919 states and 2628 transitions. [2022-01-18 05:09:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:49,057 INFO L225 Difference]: With dead ends: 919 [2022-01-18 05:09:49,057 INFO L226 Difference]: Without dead ends: 909 [2022-01-18 05:09:49,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:09:49,058 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 263 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:49,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 239 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-18 05:09:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 482. [2022-01-18 05:09:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0374220374220373) internal successors, (1461), 481 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1461 transitions. [2022-01-18 05:09:49,065 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1461 transitions. Word has length 22 [2022-01-18 05:09:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:49,065 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1461 transitions. [2022-01-18 05:09:49,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1461 transitions. [2022-01-18 05:09:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:49,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:49,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:49,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:49,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-01-18 05:09:49,267 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:49,267 INFO L85 PathProgramCache]: Analyzing trace with hash 988888113, now seen corresponding path program 194 times [2022-01-18 05:09:49,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:49,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834814410] [2022-01-18 05:09:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:49,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:49,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834814410] [2022-01-18 05:09:49,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834814410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426572550] [2022-01-18 05:09:49,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:49,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:49,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:49,358 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) [2022-01-18 05:09:49,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 05:09:49,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:49,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:49,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:49,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:49,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:49,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-01-18 05:09:49,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-18 05:09:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:49,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:50,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:50,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:50,101 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:50,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:50,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:50,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426572550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:50,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:50,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:50,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780882571] [2022-01-18 05:09:50,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:50,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:50,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:50,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:50,108 INFO L87 Difference]: Start difference. First operand 482 states and 1461 transitions. Second operand has 23 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) [2022-01-18 05:09:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:50,518 INFO L93 Difference]: Finished difference Result 877 states and 2538 transitions. [2022-01-18 05:09:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:09:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 22 [2022-01-18 05:09:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:50,520 INFO L225 Difference]: With dead ends: 877 [2022-01-18 05:09:50,520 INFO L226 Difference]: Without dead ends: 877 [2022-01-18 05:09:50,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:09:50,520 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 238 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:50,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 160 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-18 05:09:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 480. [2022-01-18 05:09:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0313152400835075) internal successors, (1452), 479 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1452 transitions. [2022-01-18 05:09:50,526 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1452 transitions. Word has length 22 [2022-01-18 05:09:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:50,526 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1452 transitions. [2022-01-18 05:09:50,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 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) [2022-01-18 05:09:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1452 transitions. [2022-01-18 05:09:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:50,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:50,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:50,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 05:09:50,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 05:09:50,727 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1087941191, now seen corresponding path program 195 times [2022-01-18 05:09:50,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538638688] [2022-01-18 05:09:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:50,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:50,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:50,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538638688] [2022-01-18 05:09:50,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538638688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:50,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350606910] [2022-01-18 05:09:50,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:50,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:50,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:50,812 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) [2022-01-18 05:09:50,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 05:09:51,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:09:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:51,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:51,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:51,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:09:51,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:09:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:51,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:51,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:51,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:51,520 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:51,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:51,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:51,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350606910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:51,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:51,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:51,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132479171] [2022-01-18 05:09:51,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:51,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:51,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:51,528 INFO L87 Difference]: Start difference. First operand 480 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:51,879 INFO L93 Difference]: Finished difference Result 834 states and 2403 transitions. [2022-01-18 05:09:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:09:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:51,881 INFO L225 Difference]: With dead ends: 834 [2022-01-18 05:09:51,881 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 05:09:51,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:09:51,881 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 211 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:51,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 194 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 05:09:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 494. [2022-01-18 05:09:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.0425963488843815) internal successors, (1500), 493 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1500 transitions. [2022-01-18 05:09:51,888 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1500 transitions. Word has length 22 [2022-01-18 05:09:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:51,888 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1500 transitions. [2022-01-18 05:09:51,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1500 transitions. [2022-01-18 05:09:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:51,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:51,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:51,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-18 05:09:52,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:52,089 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash -745691697, now seen corresponding path program 196 times [2022-01-18 05:09:52,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:52,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296109431] [2022-01-18 05:09:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:52,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:52,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:52,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296109431] [2022-01-18 05:09:52,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296109431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:52,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466256811] [2022-01-18 05:09:52,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:52,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:52,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:52,178 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) [2022-01-18 05:09:52,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 05:09:52,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:52,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:52,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:52,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:52,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:09:52,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:09:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:52,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:52,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:52,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:52,859 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:52,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:52,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:52,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466256811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:52,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:52,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:52,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089258438] [2022-01-18 05:09:52,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:52,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:52,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:52,867 INFO L87 Difference]: Start difference. First operand 494 states and 1500 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:53,249 INFO L93 Difference]: Finished difference Result 860 states and 2458 transitions. [2022-01-18 05:09:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:09:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:53,250 INFO L225 Difference]: With dead ends: 860 [2022-01-18 05:09:53,250 INFO L226 Difference]: Without dead ends: 850 [2022-01-18 05:09:53,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:53,250 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 155 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:53,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 212 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-18 05:09:53,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 506. [2022-01-18 05:09:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.0455445544554456) internal successors, (1538), 505 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1538 transitions. [2022-01-18 05:09:53,257 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1538 transitions. Word has length 22 [2022-01-18 05:09:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:53,257 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1538 transitions. [2022-01-18 05:09:53,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1538 transitions. [2022-01-18 05:09:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:53,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:53,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:53,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 05:09:53,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 05:09:53,458 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1968503683, now seen corresponding path program 197 times [2022-01-18 05:09:53,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:53,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464418293] [2022-01-18 05:09:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:53,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:53,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:53,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464418293] [2022-01-18 05:09:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464418293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:53,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181455766] [2022-01-18 05:09:53,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:53,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:53,555 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) [2022-01-18 05:09:53,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 05:09:53,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:09:53,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:53,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:53,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:53,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:53,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-01-18 05:09:53,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-01-18 05:09:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:54,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:54,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:54,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 05:09:54,233 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:54,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:54,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181455766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:54,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:54,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:09:54,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660472028] [2022-01-18 05:09:54,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:54,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:54,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:54,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:54,240 INFO L87 Difference]: Start difference. First operand 506 states and 1538 transitions. Second operand has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:54,574 INFO L93 Difference]: Finished difference Result 774 states and 2250 transitions. [2022-01-18 05:09:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) 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 22 [2022-01-18 05:09:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:54,576 INFO L225 Difference]: With dead ends: 774 [2022-01-18 05:09:54,576 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 05:09:54,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:54,576 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 144 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:54,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 172 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 05:09:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 502. [2022-01-18 05:09:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.0459081836327346) internal successors, (1526), 501 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1526 transitions. [2022-01-18 05:09:54,582 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1526 transitions. Word has length 22 [2022-01-18 05:09:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:54,582 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1526 transitions. [2022-01-18 05:09:54,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) 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) [2022-01-18 05:09:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1526 transitions. [2022-01-18 05:09:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:54,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:54,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:54,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 05:09:54,783 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,SelfDestructingSolverStorable213 [2022-01-18 05:09:54,783 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:54,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1687399163, now seen corresponding path program 198 times [2022-01-18 05:09:54,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:54,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644522965] [2022-01-18 05:09:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:54,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:54,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:54,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644522965] [2022-01-18 05:09:54,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644522965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:54,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120345804] [2022-01-18 05:09:54,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:54,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:54,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:54,879 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) [2022-01-18 05:09:54,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 05:09:55,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:55,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:55,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-01-18 05:09:55,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-01-18 05:09:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:55,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:55,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:55,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:55,632 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:55,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:55,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:55,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120345804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:55,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:55,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:09:55,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277283573] [2022-01-18 05:09:55,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:55,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:09:55,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:09:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:09:55,639 INFO L87 Difference]: Start difference. First operand 502 states and 1526 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:56,019 INFO L93 Difference]: Finished difference Result 752 states and 2202 transitions. [2022-01-18 05:09:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:09:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:56,020 INFO L225 Difference]: With dead ends: 752 [2022-01-18 05:09:56,021 INFO L226 Difference]: Without dead ends: 752 [2022-01-18 05:09:56,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:09:56,021 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:56,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 211 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-18 05:09:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 507. [2022-01-18 05:09:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.041501976284585) internal successors, (1539), 506 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1539 transitions. [2022-01-18 05:09:56,027 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1539 transitions. Word has length 22 [2022-01-18 05:09:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:56,027 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1539 transitions. [2022-01-18 05:09:56,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1539 transitions. [2022-01-18 05:09:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:56,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:56,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:56,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 05:09:56,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:56,228 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1112965169, now seen corresponding path program 199 times [2022-01-18 05:09:56,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:56,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492726533] [2022-01-18 05:09:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:56,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:56,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:56,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492726533] [2022-01-18 05:09:56,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492726533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:56,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459431843] [2022-01-18 05:09:56,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:56,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:56,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:56,318 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) [2022-01-18 05:09:56,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 05:09:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:56,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:56,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:56,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:56,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-01-18 05:09:56,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-01-18 05:09:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:56,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:56,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:56,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:57,029 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:57,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:57,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459431843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:57,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:57,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:57,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260742564] [2022-01-18 05:09:57,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:57,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:57,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:57,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:57,036 INFO L87 Difference]: Start difference. First operand 507 states and 1539 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:57,400 INFO L93 Difference]: Finished difference Result 727 states and 2143 transitions. [2022-01-18 05:09:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:57,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:57,402 INFO L225 Difference]: With dead ends: 727 [2022-01-18 05:09:57,402 INFO L226 Difference]: Without dead ends: 717 [2022-01-18 05:09:57,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:57,402 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:57,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 230 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-18 05:09:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 486. [2022-01-18 05:09:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.022680412371134) internal successors, (1466), 485 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1466 transitions. [2022-01-18 05:09:57,408 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1466 transitions. Word has length 22 [2022-01-18 05:09:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:57,408 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1466 transitions. [2022-01-18 05:09:57,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1466 transitions. [2022-01-18 05:09:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:57,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:57,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:57,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 05:09:57,609 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,SelfDestructingSolverStorable215 [2022-01-18 05:09:57,609 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:57,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1638885455, now seen corresponding path program 200 times [2022-01-18 05:09:57,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:57,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507288118] [2022-01-18 05:09:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:57,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:57,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507288118] [2022-01-18 05:09:57,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507288118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991264165] [2022-01-18 05:09:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:57,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:57,707 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) [2022-01-18 05:09:57,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 05:09:57,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:57,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:09:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:58,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:09:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:58,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:58,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:58,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:09:58,453 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:58,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:09:58,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:09:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:58,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991264165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:58,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:58,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:09:58,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385362169] [2022-01-18 05:09:58,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:58,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:58,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:58,460 INFO L87 Difference]: Start difference. First operand 486 states and 1466 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:58,809 INFO L93 Difference]: Finished difference Result 657 states and 1955 transitions. [2022-01-18 05:09:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:09:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:09:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:58,810 INFO L225 Difference]: With dead ends: 657 [2022-01-18 05:09:58,810 INFO L226 Difference]: Without dead ends: 657 [2022-01-18 05:09:58,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:09:58,810 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:58,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 196 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:09:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-18 05:09:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 483. [2022-01-18 05:09:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.0228215767634854) internal successors, (1457), 482 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1457 transitions. [2022-01-18 05:09:58,816 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1457 transitions. Word has length 22 [2022-01-18 05:09:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:58,816 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1457 transitions. [2022-01-18 05:09:58,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:09:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1457 transitions. [2022-01-18 05:09:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:09:58,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:58,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:58,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 05:09:59,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:59,017 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:59,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1132668067, now seen corresponding path program 201 times [2022-01-18 05:09:59,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:59,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398705211] [2022-01-18 05:09:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:59,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:59,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:59,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398705211] [2022-01-18 05:09:59,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398705211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:59,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484276263] [2022-01-18 05:09:59,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:59,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:59,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:59,109 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) [2022-01-18 05:09:59,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 05:09:59,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:59,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:59,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 05:09:59,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:59,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 05:09:59,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-01-18 05:09:59,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 137 [2022-01-18 05:09:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:09:59,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:59,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 231 [2022-01-18 05:10:00,114 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:00,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:10:00,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-01-18 05:10:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:00,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484276263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:00,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:00,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-01-18 05:10:00,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929822824] [2022-01-18 05:10:00,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:00,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:10:00,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:10:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:10:00,121 INFO L87 Difference]: Start difference. First operand 483 states and 1457 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2022-01-18 05:10:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:00,572 INFO L93 Difference]: Finished difference Result 974 states and 2803 transitions. [2022-01-18 05:10:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:10:00,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 22 [2022-01-18 05:10:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:00,573 INFO L225 Difference]: With dead ends: 974 [2022-01-18 05:10:00,573 INFO L226 Difference]: Without dead ends: 923 [2022-01-18 05:10:00,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:10:00,574 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:00,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 195 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:10:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-18 05:10:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 481. [2022-01-18 05:10:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0166666666666666) internal successors, (1448), 480 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1448 transitions. [2022-01-18 05:10:00,580 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1448 transitions. Word has length 22 [2022-01-18 05:10:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:00,580 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1448 transitions. [2022-01-18 05:10:00,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2022-01-18 05:10:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1448 transitions. [2022-01-18 05:10:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:00,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:00,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:00,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 05:10:00,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 05:10:00,781 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1085469925, now seen corresponding path program 202 times [2022-01-18 05:10:00,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386031369] [2022-01-18 05:10:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:00,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:00,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:00,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386031369] [2022-01-18 05:10:00,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386031369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:00,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553419788] [2022-01-18 05:10:00,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:10:00,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:00,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:00,878 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) [2022-01-18 05:10:00,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 05:10:01,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:10:01,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:01,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:10:01,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-01-18 05:10:01,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 05:10:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:01,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:01,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:01,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:10:01,571 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:01,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:10:01,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:01,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553419788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:01,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:01,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:10:01,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197812148] [2022-01-18 05:10:01,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:01,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:01,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:01,578 INFO L87 Difference]: Start difference. First operand 481 states and 1448 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:01,849 INFO L93 Difference]: Finished difference Result 663 states and 1924 transitions. [2022-01-18 05:10:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:10:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:01,850 INFO L225 Difference]: With dead ends: 663 [2022-01-18 05:10:01,850 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 05:10:01,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:01,850 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 148 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:01,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:10:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 05:10:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 489. [2022-01-18 05:10:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.0040983606557377) internal successors, (1466), 488 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1466 transitions. [2022-01-18 05:10:01,856 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1466 transitions. Word has length 22 [2022-01-18 05:10:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:01,856 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1466 transitions. [2022-01-18 05:10:01,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1466 transitions. [2022-01-18 05:10:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:01,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:01,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:01,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 05:10:02,057 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,SelfDestructingSolverStorable218 [2022-01-18 05:10:02,057 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:02,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1049870599, now seen corresponding path program 203 times [2022-01-18 05:10:02,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:02,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307453170] [2022-01-18 05:10:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:02,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:02,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:02,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307453170] [2022-01-18 05:10:02,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307453170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:02,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721187025] [2022-01-18 05:10:02,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:10:02,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:02,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:02,156 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) [2022-01-18 05:10:02,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 05:10:02,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:10:02,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:02,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:10:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:02,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:02,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:02,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:10:02,868 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:02,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 05:10:02,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:02,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721187025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:02,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:02,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:10:02,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456845121] [2022-01-18 05:10:02,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:02,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:02,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:02,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:02,875 INFO L87 Difference]: Start difference. First operand 489 states and 1466 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:03,187 INFO L93 Difference]: Finished difference Result 616 states and 1829 transitions. [2022-01-18 05:10:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:10:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:03,188 INFO L225 Difference]: With dead ends: 616 [2022-01-18 05:10:03,188 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 05:10:03,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:03,189 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:03,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 169 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:10:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 05:10:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 456. [2022-01-18 05:10:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.002197802197802) internal successors, (1366), 455 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1366 transitions. [2022-01-18 05:10:03,194 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1366 transitions. Word has length 22 [2022-01-18 05:10:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:03,194 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1366 transitions. [2022-01-18 05:10:03,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1366 transitions. [2022-01-18 05:10:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:03,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:03,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:03,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 05:10:03,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:03,395 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:03,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2103683403, now seen corresponding path program 204 times [2022-01-18 05:10:03,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:03,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226416290] [2022-01-18 05:10:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:03,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:03,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226416290] [2022-01-18 05:10:03,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226416290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496477197] [2022-01-18 05:10:03,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:10:03,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:03,464 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) [2022-01-18 05:10:03,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 05:10:03,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:10:03,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:03,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:03,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:10:03,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:10:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:03,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:04,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:04,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:10:04,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:04,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:04,076 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:04,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:04,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496477197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:04,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:04,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-01-18 05:10:04,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994354665] [2022-01-18 05:10:04,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:04,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:10:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:10:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:10:04,083 INFO L87 Difference]: Start difference. First operand 456 states and 1366 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:05,564 INFO L93 Difference]: Finished difference Result 1667 states and 4787 transitions. [2022-01-18 05:10:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:10:05,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:05,566 INFO L225 Difference]: With dead ends: 1667 [2022-01-18 05:10:05,566 INFO L226 Difference]: Without dead ends: 1517 [2022-01-18 05:10:05,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=658, Invalid=2764, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:10:05,567 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 315 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:05,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 566 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:10:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-01-18 05:10:05,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 486. [2022-01-18 05:10:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.02680412371134) internal successors, (1468), 485 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1468 transitions. [2022-01-18 05:10:05,575 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1468 transitions. Word has length 22 [2022-01-18 05:10:05,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:05,575 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1468 transitions. [2022-01-18 05:10:05,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:05,575 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1468 transitions. [2022-01-18 05:10:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:05,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:05,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:05,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:05,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:05,776 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1885422411, now seen corresponding path program 205 times [2022-01-18 05:10:05,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405915076] [2022-01-18 05:10:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:05,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:05,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:05,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405915076] [2022-01-18 05:10:05,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405915076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:05,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891813226] [2022-01-18 05:10:05,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:10:05,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:05,853 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) [2022-01-18 05:10:05,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 05:10:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:06,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 05:10:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:06,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:06,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 05:10:06,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:06,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:06,495 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:06,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:06,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891813226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:06,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:06,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-01-18 05:10:06,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617201695] [2022-01-18 05:10:06,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:06,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:06,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:06,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:06,502 INFO L87 Difference]: Start difference. First operand 486 states and 1468 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:07,765 INFO L93 Difference]: Finished difference Result 1454 states and 4222 transitions. [2022-01-18 05:10:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:10:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:07,767 INFO L225 Difference]: With dead ends: 1454 [2022-01-18 05:10:07,768 INFO L226 Difference]: Without dead ends: 1352 [2022-01-18 05:10:07,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=2398, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:10:07,768 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 192 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:07,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 579 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:10:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-01-18 05:10:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 450. [2022-01-18 05:10:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.002227171492205) internal successors, (1348), 449 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1348 transitions. [2022-01-18 05:10:07,776 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1348 transitions. Word has length 22 [2022-01-18 05:10:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:07,776 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1348 transitions. [2022-01-18 05:10:07,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1348 transitions. [2022-01-18 05:10:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:07,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:07,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:07,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 05:10:07,977 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,SelfDestructingSolverStorable221 [2022-01-18 05:10:07,977 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:07,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2078687993, now seen corresponding path program 206 times [2022-01-18 05:10:07,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712546950] [2022-01-18 05:10:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:07,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:08,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712546950] [2022-01-18 05:10:08,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712546950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613465903] [2022-01-18 05:10:08,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:10:08,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:08,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:08,084 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) [2022-01-18 05:10:08,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 05:10:08,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:10:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:08,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:08,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:08,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-01-18 05:10:08,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:08,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:08,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:08,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:10:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:08,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:08,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:08,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:10:08,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:08,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:08,834 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:08,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:08,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613465903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:08,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:08,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:10:08,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662702569] [2022-01-18 05:10:08,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:08,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:08,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:08,844 INFO L87 Difference]: Start difference. First operand 450 states and 1348 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:09,290 INFO L93 Difference]: Finished difference Result 878 states and 2552 transitions. [2022-01-18 05:10:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:10:09,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:09,291 INFO L225 Difference]: With dead ends: 878 [2022-01-18 05:10:09,291 INFO L226 Difference]: Without dead ends: 811 [2022-01-18 05:10:09,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:10:09,292 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 162 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:09,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 280 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 639 Invalid, 0 Unknown, 316 Unchecked, 0.2s Time] [2022-01-18 05:10:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-18 05:10:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 457. [2022-01-18 05:10:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.017543859649123) internal successors, (1376), 456 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1376 transitions. [2022-01-18 05:10:09,297 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1376 transitions. Word has length 22 [2022-01-18 05:10:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:09,298 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1376 transitions. [2022-01-18 05:10:09,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1376 transitions. [2022-01-18 05:10:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:09,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:09,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:09,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-18 05:10:09,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-01-18 05:10:09,499 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:09,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1709203663, now seen corresponding path program 207 times [2022-01-18 05:10:09,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:09,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121897396] [2022-01-18 05:10:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:09,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:09,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121897396] [2022-01-18 05:10:09,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121897396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198250840] [2022-01-18 05:10:09,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:10:09,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:09,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:09,623 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) [2022-01-18 05:10:09,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 05:10:09,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:10:09,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:10,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:10,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-01-18 05:10:10,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:10,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:10:10,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:10,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:10,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:10,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:10,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:10:10,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:10,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:10,349 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:10,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:10,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198250840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:10,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:10,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 05:10:10,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323338395] [2022-01-18 05:10:10,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:10,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:10,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:10,359 INFO L87 Difference]: Start difference. First operand 457 states and 1376 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:10,717 INFO L93 Difference]: Finished difference Result 673 states and 2000 transitions. [2022-01-18 05:10:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:10:10,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:10,719 INFO L225 Difference]: With dead ends: 673 [2022-01-18 05:10:10,719 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 05:10:10,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:10:10,719 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:10,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 203 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 444 Invalid, 0 Unknown, 343 Unchecked, 0.2s Time] [2022-01-18 05:10:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 05:10:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 469. [2022-01-18 05:10:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0235042735042734) internal successors, (1415), 468 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1415 transitions. [2022-01-18 05:10:10,724 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1415 transitions. Word has length 22 [2022-01-18 05:10:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1415 transitions. [2022-01-18 05:10:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1415 transitions. [2022-01-18 05:10:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:10,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:10,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:10,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:10,925 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,SelfDestructingSolverStorable223 [2022-01-18 05:10:10,925 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -696511131, now seen corresponding path program 208 times [2022-01-18 05:10:10,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:10,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76942692] [2022-01-18 05:10:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:10,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:11,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76942692] [2022-01-18 05:10:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76942692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211046096] [2022-01-18 05:10:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:10:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:11,068 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) [2022-01-18 05:10:11,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 05:10:11,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:10:11,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:11,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:11,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:11,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:11,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-01-18 05:10:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:11,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:11,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-01-18 05:10:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:11,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:11,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:11,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:10:11,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:11,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:11,844 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:11,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:11,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211046096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:11,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:11,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 05:10:11,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613898806] [2022-01-18 05:10:11,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:11,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:11,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:11,854 INFO L87 Difference]: Start difference. First operand 469 states and 1415 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:12,289 INFO L93 Difference]: Finished difference Result 640 states and 1911 transitions. [2022-01-18 05:10:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:10:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:12,290 INFO L225 Difference]: With dead ends: 640 [2022-01-18 05:10:12,290 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 05:10:12,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:10:12,290 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:12,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 196 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 497 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-18 05:10:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 05:10:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 490. [2022-01-18 05:10:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.0245398773006134) internal successors, (1479), 489 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1479 transitions. [2022-01-18 05:10:12,297 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1479 transitions. Word has length 22 [2022-01-18 05:10:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:12,297 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1479 transitions. [2022-01-18 05:10:12,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1479 transitions. [2022-01-18 05:10:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:12,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:12,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:12,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 05:10:12,498 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,SelfDestructingSolverStorable224 [2022-01-18 05:10:12,498 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -153837659, now seen corresponding path program 209 times [2022-01-18 05:10:12,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10918872] [2022-01-18 05:10:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:12,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:12,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10918872] [2022-01-18 05:10:12,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10918872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298930408] [2022-01-18 05:10:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:10:12,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:12,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:12,627 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) [2022-01-18 05:10:12,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 05:10:12,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:10:12,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:12,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:13,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-01-18 05:10:13,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:13,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-01-18 05:10:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:13,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:13,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:13,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:10:13,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:13,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:13,331 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:13,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:13,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298930408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:13,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:13,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 05:10:13,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222374321] [2022-01-18 05:10:13,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:13,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:13,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:13,341 INFO L87 Difference]: Start difference. First operand 490 states and 1479 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:13,783 INFO L93 Difference]: Finished difference Result 677 states and 2005 transitions. [2022-01-18 05:10:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:10:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:13,785 INFO L225 Difference]: With dead ends: 677 [2022-01-18 05:10:13,785 INFO L226 Difference]: Without dead ends: 658 [2022-01-18 05:10:13,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:10:13,785 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:13,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 186 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 447 Invalid, 0 Unknown, 324 Unchecked, 0.2s Time] [2022-01-18 05:10:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-18 05:10:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 493. [2022-01-18 05:10:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.0101626016260163) internal successors, (1481), 492 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1481 transitions. [2022-01-18 05:10:13,791 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1481 transitions. Word has length 22 [2022-01-18 05:10:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:13,791 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1481 transitions. [2022-01-18 05:10:13,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1481 transitions. [2022-01-18 05:10:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:13,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:13,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:13,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 05:10:13,992 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,SelfDestructingSolverStorable225 [2022-01-18 05:10:13,992 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash -668967865, now seen corresponding path program 210 times [2022-01-18 05:10:13,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:13,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597570699] [2022-01-18 05:10:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:13,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:14,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597570699] [2022-01-18 05:10:14,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597570699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435462378] [2022-01-18 05:10:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:10:14,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:14,083 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) [2022-01-18 05:10:14,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 05:10:14,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:10:14,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:14,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:14,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:14,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:14,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:10:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:14,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:14,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:14,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:10:14,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:14,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:14,726 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:14,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:14,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435462378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:14,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:14,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 05:10:14,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535619988] [2022-01-18 05:10:14,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:14,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:10:14,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:10:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:10:14,738 INFO L87 Difference]: Start difference. First operand 493 states and 1481 transitions. Second operand has 20 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) [2022-01-18 05:10:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:15,009 INFO L93 Difference]: Finished difference Result 758 states and 2260 transitions. [2022-01-18 05:10:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:10:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:15,010 INFO L225 Difference]: With dead ends: 758 [2022-01-18 05:10:15,010 INFO L226 Difference]: Without dead ends: 758 [2022-01-18 05:10:15,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:10:15,010 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:15,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 157 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 512 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-18 05:10:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-01-18 05:10:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 507. [2022-01-18 05:10:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.0019762845849804) internal successors, (1519), 506 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1519 transitions. [2022-01-18 05:10:15,016 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1519 transitions. Word has length 22 [2022-01-18 05:10:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:15,017 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1519 transitions. [2022-01-18 05:10:15,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 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) [2022-01-18 05:10:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1519 transitions. [2022-01-18 05:10:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:15,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:15,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:15,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 05:10:15,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:15,218 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:15,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2081104959, now seen corresponding path program 211 times [2022-01-18 05:10:15,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421070982] [2022-01-18 05:10:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:15,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:15,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421070982] [2022-01-18 05:10:15,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421070982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675586960] [2022-01-18 05:10:15,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:10:15,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:15,302 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) [2022-01-18 05:10:15,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 05:10:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:15,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:15,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:15,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:15,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 05:10:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:15,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:15,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:15,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:10:15,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:15,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:15,950 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:15,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:15,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675586960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:15,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:15,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-01-18 05:10:15,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536444248] [2022-01-18 05:10:15,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:15,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:10:15,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:15,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:10:15,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:10:15,963 INFO L87 Difference]: Start difference. First operand 507 states and 1519 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:16,391 INFO L93 Difference]: Finished difference Result 906 states and 2618 transitions. [2022-01-18 05:10:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:10:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:16,393 INFO L225 Difference]: With dead ends: 906 [2022-01-18 05:10:16,393 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 05:10:16,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:16,393 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:16,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 245 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 942 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-01-18 05:10:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 05:10:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 513. [2022-01-18 05:10:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.99609375) internal successors, (1534), 512 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1534 transitions. [2022-01-18 05:10:16,400 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1534 transitions. Word has length 22 [2022-01-18 05:10:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:16,400 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1534 transitions. [2022-01-18 05:10:16,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1534 transitions. [2022-01-18 05:10:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:16,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:16,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:16,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:16,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:16,601 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash -450706873, now seen corresponding path program 212 times [2022-01-18 05:10:16,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:16,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963360428] [2022-01-18 05:10:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:16,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:16,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963360428] [2022-01-18 05:10:16,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963360428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377226299] [2022-01-18 05:10:16,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:10:16,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:16,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:16,709 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) [2022-01-18 05:10:16,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 05:10:16,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:10:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:17,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:17,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 05:10:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:17,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:17,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:17,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 05:10:17,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:17,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:17,418 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:17,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:17,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377226299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:17,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:17,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:10:17,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436082692] [2022-01-18 05:10:17,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:17,429 INFO L87 Difference]: Start difference. First operand 513 states and 1534 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:17,900 INFO L93 Difference]: Finished difference Result 766 states and 2222 transitions. [2022-01-18 05:10:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:10:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:17,901 INFO L225 Difference]: With dead ends: 766 [2022-01-18 05:10:17,901 INFO L226 Difference]: Without dead ends: 699 [2022-01-18 05:10:17,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:10:17,901 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:17,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 272 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1022 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-01-18 05:10:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-18 05:10:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 461. [2022-01-18 05:10:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.95) internal successors, (1357), 460 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) [2022-01-18 05:10:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1357 transitions. [2022-01-18 05:10:17,907 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1357 transitions. Word has length 22 [2022-01-18 05:10:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:17,907 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1357 transitions. [2022-01-18 05:10:17,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1357 transitions. [2022-01-18 05:10:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:17,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:17,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:17,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-01-18 05:10:18,108 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,SelfDestructingSolverStorable228 [2022-01-18 05:10:18,108 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash 307691045, now seen corresponding path program 213 times [2022-01-18 05:10:18,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047669490] [2022-01-18 05:10:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:18,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:18,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047669490] [2022-01-18 05:10:18,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047669490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575228188] [2022-01-18 05:10:18,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:10:18,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:18,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:18,231 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) [2022-01-18 05:10:18,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 05:10:18,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:10:18,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:18,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:18,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:18,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:18,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-01-18 05:10:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:18,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:10:18,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:18,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:18,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:18,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:18,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:10:18,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:18,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:18,962 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:18,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:18,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575228188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:18,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:18,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:10:18,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731967438] [2022-01-18 05:10:18,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:18,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:10:18,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:18,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:10:18,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:10:18,972 INFO L87 Difference]: Start difference. First operand 461 states and 1357 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:19,421 INFO L93 Difference]: Finished difference Result 818 states and 2330 transitions. [2022-01-18 05:10:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:10:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:19,423 INFO L225 Difference]: With dead ends: 818 [2022-01-18 05:10:19,423 INFO L226 Difference]: Without dead ends: 797 [2022-01-18 05:10:19,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:10:19,423 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 112 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:19,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 303 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 686 Invalid, 0 Unknown, 293 Unchecked, 0.2s Time] [2022-01-18 05:10:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-18 05:10:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 459. [2022-01-18 05:10:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9519650655021836) internal successors, (1352), 458 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1352 transitions. [2022-01-18 05:10:19,429 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1352 transitions. Word has length 22 [2022-01-18 05:10:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:19,429 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1352 transitions. [2022-01-18 05:10:19,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1352 transitions. [2022-01-18 05:10:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:19,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:19,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:19,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 05:10:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:19,630 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1748170839, now seen corresponding path program 214 times [2022-01-18 05:10:19,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:19,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866003779] [2022-01-18 05:10:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:19,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:19,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866003779] [2022-01-18 05:10:19,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866003779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246050814] [2022-01-18 05:10:19,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:10:19,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:19,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:19,720 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) [2022-01-18 05:10:19,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 05:10:19,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:10:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:20,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:20,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-18 05:10:20,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:20,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-18 05:10:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:20,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:20,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:20,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:10:20,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:20,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:20,375 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:20,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:20,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246050814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:20,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:20,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:10:20,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596557579] [2022-01-18 05:10:20,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:20,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:10:20,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:20,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:10:20,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:10:20,387 INFO L87 Difference]: Start difference. First operand 459 states and 1352 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2022-01-18 05:10:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:21,032 INFO L93 Difference]: Finished difference Result 939 states and 2650 transitions. [2022-01-18 05:10:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:10:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 22 [2022-01-18 05:10:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:21,034 INFO L225 Difference]: With dead ends: 939 [2022-01-18 05:10:21,034 INFO L226 Difference]: Without dead ends: 843 [2022-01-18 05:10:21,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:10:21,034 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 163 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:21,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 321 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:10:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-18 05:10:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 439. [2022-01-18 05:10:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.9292237442922375) internal successors, (1283), 438 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1283 transitions. [2022-01-18 05:10:21,040 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1283 transitions. Word has length 22 [2022-01-18 05:10:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:21,040 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1283 transitions. [2022-01-18 05:10:21,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2022-01-18 05:10:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1283 transitions. [2022-01-18 05:10:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:21,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:21,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:21,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-18 05:10:21,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:21,243 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:21,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1027565477, now seen corresponding path program 215 times [2022-01-18 05:10:21,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:21,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162902270] [2022-01-18 05:10:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:21,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:21,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:21,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162902270] [2022-01-18 05:10:21,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162902270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:21,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005857227] [2022-01-18 05:10:21,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:10:21,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:21,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:21,346 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) [2022-01-18 05:10:21,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 05:10:21,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:10:21,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:21,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:21,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-01-18 05:10:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:21,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-01-18 05:10:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:21,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:21,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:21,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-18 05:10:22,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:22,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:22,021 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:22,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:22,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005857227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:22,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:22,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:10:22,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685258277] [2022-01-18 05:10:22,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:22,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:10:22,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:10:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:10:22,031 INFO L87 Difference]: Start difference. First operand 439 states and 1283 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:22,613 INFO L93 Difference]: Finished difference Result 742 states and 2126 transitions. [2022-01-18 05:10:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:10:22,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:22,614 INFO L225 Difference]: With dead ends: 742 [2022-01-18 05:10:22,614 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 05:10:22,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:10:22,615 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:22,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 317 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 570 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-01-18 05:10:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 05:10:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 445. [2022-01-18 05:10:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.936936936936937) internal successors, (1304), 444 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1304 transitions. [2022-01-18 05:10:22,622 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1304 transitions. Word has length 22 [2022-01-18 05:10:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:22,623 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1304 transitions. [2022-01-18 05:10:22,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1304 transitions. [2022-01-18 05:10:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:10:22,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:22,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:22,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:22,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:22,847 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1417696077, now seen corresponding path program 216 times [2022-01-18 05:10:22,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:22,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497123744] [2022-01-18 05:10:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:22,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:22,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:22,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497123744] [2022-01-18 05:10:22,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497123744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:22,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743544242] [2022-01-18 05:10:22,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:10:22,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:22,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:22,922 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) [2022-01-18 05:10:22,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 05:10:23,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:10:23,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:23,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-01-18 05:10:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:23,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:23,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:23,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 05:10:23,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:23,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-01-18 05:10:23,584 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 05:10:23,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 05:10:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:23,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743544242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:23,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:23,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:10:23,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130496996] [2022-01-18 05:10:23,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:23,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:10:23,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:10:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:10:23,595 INFO L87 Difference]: Start difference. First operand 445 states and 1304 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:24,166 INFO L93 Difference]: Finished difference Result 749 states and 2142 transitions. [2022-01-18 05:10:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:10:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:10:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:24,167 INFO L225 Difference]: With dead ends: 749 [2022-01-18 05:10:24,167 INFO L226 Difference]: Without dead ends: 615 [2022-01-18 05:10:24,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:10:24,167 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:24,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 243 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:10:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-18 05:10:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 411. [2022-01-18 05:10:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.9170731707317072) internal successors, (1196), 410 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1196 transitions. [2022-01-18 05:10:24,175 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1196 transitions. Word has length 22 [2022-01-18 05:10:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:24,175 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1196 transitions. [2022-01-18 05:10:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1196 transitions. [2022-01-18 05:10:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:10:24,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:24,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:24,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:24,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-01-18 05:10:24,383 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:24,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:24,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2020815505, now seen corresponding path program 217 times [2022-01-18 05:10:24,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:24,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084322622] [2022-01-18 05:10:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:24,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:10:24,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084322622] [2022-01-18 05:10:24,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084322622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164578288] [2022-01-18 05:10:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:10:24,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:24,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:24,522 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) [2022-01-18 05:10:24,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 05:10:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:10:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:24,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 250 [2022-01-18 05:10:25,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:25,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 174 [2022-01-18 05:10:25,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-01-18 05:10:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:10:25,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:26,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-01-18 05:10:26,445 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:26,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 237 [2022-01-18 05:10:26,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 209 [2022-01-18 05:10:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:10:26,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164578288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:26,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:26,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:10:26,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123866075] [2022-01-18 05:10:26,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:26,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:10:26,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:10:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:10:26,675 INFO L87 Difference]: Start difference. First operand 411 states and 1196 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-01-18 05:10:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:27,581 INFO L93 Difference]: Finished difference Result 839 states and 2488 transitions. [2022-01-18 05:10:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:10:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:10:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:27,582 INFO L225 Difference]: With dead ends: 839 [2022-01-18 05:10:27,582 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 05:10:27,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:10:27,582 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 291 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:27,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 286 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 769 Invalid, 0 Unknown, 167 Unchecked, 0.3s Time] [2022-01-18 05:10:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 05:10:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 440. [2022-01-18 05:10:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.002277904328018) internal successors, (1318), 439 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1318 transitions. [2022-01-18 05:10:27,588 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1318 transitions. Word has length 23 [2022-01-18 05:10:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:27,588 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1318 transitions. [2022-01-18 05:10:27,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-01-18 05:10:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1318 transitions. [2022-01-18 05:10:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:10:27,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:27,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:27,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-18 05:10:27,789 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,SelfDestructingSolverStorable233 [2022-01-18 05:10:27,789 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1499006063, now seen corresponding path program 218 times [2022-01-18 05:10:27,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35308680] [2022-01-18 05:10:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:27,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:28,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35308680] [2022-01-18 05:10:28,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35308680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975579825] [2022-01-18 05:10:28,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:10:28,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:28,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:28,039 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) [2022-01-18 05:10:28,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 05:10:28,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:10:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:28,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:10:28,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:28,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 163 [2022-01-18 05:10:28,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:28,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 168 [2022-01-18 05:10:28,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-01-18 05:10:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:29,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:10:30,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:10:30,063 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:30,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 05:10:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:30,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975579825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:30,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:30,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:10:30,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121535297] [2022-01-18 05:10:30,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:30,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:30,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:30,225 INFO L87 Difference]: Start difference. First operand 440 states and 1318 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:32,355 INFO L93 Difference]: Finished difference Result 1018 states and 3114 transitions. [2022-01-18 05:10:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:10:32,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:10:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:32,357 INFO L225 Difference]: With dead ends: 1018 [2022-01-18 05:10:32,357 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 05:10:32,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=640, Invalid=3392, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:10:32,358 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 316 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:32,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 482 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 875 Invalid, 0 Unknown, 531 Unchecked, 0.4s Time] [2022-01-18 05:10:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 05:10:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 499. [2022-01-18 05:10:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.112449799196787) internal successors, (1550), 498 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1550 transitions. [2022-01-18 05:10:32,365 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1550 transitions. Word has length 23 [2022-01-18 05:10:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:32,365 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1550 transitions. [2022-01-18 05:10:32,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1550 transitions. [2022-01-18 05:10:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:10:32,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:32,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:32,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 05:10:32,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 05:10:32,566 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1703477295, now seen corresponding path program 219 times [2022-01-18 05:10:32,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:32,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801773577] [2022-01-18 05:10:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:32,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:32,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801773577] [2022-01-18 05:10:32,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801773577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801780199] [2022-01-18 05:10:32,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:10:32,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:32,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:32,789 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) [2022-01-18 05:10:32,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 05:10:33,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:10:33,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:10:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:33,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 201 [2022-01-18 05:10:33,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:10:33,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:33,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 147 [2022-01-18 05:10:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:34,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 270 [2022-01-18 05:10:34,653 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:34,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:10:34,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:10:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:34,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801780199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:34,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:34,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:10:34,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478173353] [2022-01-18 05:10:34,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:34,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:34,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:34,804 INFO L87 Difference]: Start difference. First operand 499 states and 1550 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:39,042 INFO L93 Difference]: Finished difference Result 1254 states and 3789 transitions. [2022-01-18 05:10:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:10:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:10:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:39,044 INFO L225 Difference]: With dead ends: 1254 [2022-01-18 05:10:39,045 INFO L226 Difference]: Without dead ends: 1118 [2022-01-18 05:10:39,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=796, Invalid=5056, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:10:39,045 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 543 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:39,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 653 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1738 Invalid, 0 Unknown, 589 Unchecked, 0.8s Time] [2022-01-18 05:10:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-18 05:10:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 528. [2022-01-18 05:10:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.1840607210626186) internal successors, (1678), 527 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1678 transitions. [2022-01-18 05:10:39,053 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1678 transitions. Word has length 23 [2022-01-18 05:10:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:39,053 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1678 transitions. [2022-01-18 05:10:39,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1678 transitions. [2022-01-18 05:10:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:10:39,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:39,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:39,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:39,254 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,SelfDestructingSolverStorable235 [2022-01-18 05:10:39,254 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 722270827, now seen corresponding path program 220 times [2022-01-18 05:10:39,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:39,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071278896] [2022-01-18 05:10:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:39,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:39,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071278896] [2022-01-18 05:10:39,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071278896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294682582] [2022-01-18 05:10:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:10:39,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:39,441 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) [2022-01-18 05:10:39,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 05:10:39,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:10:39,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:39,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:10:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:39,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-01-18 05:10:40,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:10:40,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:40,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 139 [2022-01-18 05:10:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:40,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:41,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-01-18 05:10:41,378 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:41,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:10:41,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:10:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:41,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294682582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:41,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:41,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:10:41,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8034385] [2022-01-18 05:10:41,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:41,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:41,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:41,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:41,543 INFO L87 Difference]: Start difference. First operand 528 states and 1678 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:42,684 INFO L93 Difference]: Finished difference Result 1005 states and 3202 transitions. [2022-01-18 05:10:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:10:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:10:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:42,686 INFO L225 Difference]: With dead ends: 1005 [2022-01-18 05:10:42,686 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 05:10:42,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:10:42,687 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 253 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:42,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 434 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 861 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-01-18 05:10:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 05:10:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 558. [2022-01-18 05:10:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.2675044883303412) internal successors, (1820), 557 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1820 transitions. [2022-01-18 05:10:42,693 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1820 transitions. Word has length 23 [2022-01-18 05:10:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:42,694 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1820 transitions. [2022-01-18 05:10:42,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1820 transitions. [2022-01-18 05:10:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:10:42,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:42,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:42,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-01-18 05:10:42,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:42,895 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1011545183, now seen corresponding path program 221 times [2022-01-18 05:10:42,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:42,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066617670] [2022-01-18 05:10:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:42,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:43,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066617670] [2022-01-18 05:10:43,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066617670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396473232] [2022-01-18 05:10:43,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:10:43,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:43,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:43,120 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) [2022-01-18 05:10:43,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 05:10:43,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:10:43,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:43,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:10:43,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:43,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:10:44,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:10:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:44,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-01-18 05:10:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:44,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:45,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 203 [2022-01-18 05:10:45,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-01-18 05:10:45,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:45,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-01-18 05:10:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:45,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396473232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:45,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:45,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:10:45,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615527662] [2022-01-18 05:10:45,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:45,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:45,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:45,609 INFO L87 Difference]: Start difference. First operand 558 states and 1820 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:51,057 INFO L93 Difference]: Finished difference Result 2134 states and 6587 transitions. [2022-01-18 05:10:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 05:10:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:10:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:51,060 INFO L225 Difference]: With dead ends: 2134 [2022-01-18 05:10:51,060 INFO L226 Difference]: Without dead ends: 1744 [2022-01-18 05:10:51,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3500 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1178, Invalid=9742, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 05:10:51,061 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 549 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 678 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:51,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1013 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 2365 Invalid, 0 Unknown, 678 Unchecked, 1.0s Time] [2022-01-18 05:10:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2022-01-18 05:10:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 658. [2022-01-18 05:10:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.450532724505327) internal successors, (2267), 657 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2267 transitions. [2022-01-18 05:10:51,072 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2267 transitions. Word has length 23 [2022-01-18 05:10:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:51,072 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2267 transitions. [2022-01-18 05:10:51,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2267 transitions. [2022-01-18 05:10:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:10:51,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:51,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:51,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 05:10:51,273 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,SelfDestructingSolverStorable237 [2022-01-18 05:10:51,273 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1321402815, now seen corresponding path program 222 times [2022-01-18 05:10:51,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186541018] [2022-01-18 05:10:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:51,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:51,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:51,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186541018] [2022-01-18 05:10:51,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186541018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764663649] [2022-01-18 05:10:51,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:10:51,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:51,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:51,446 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) [2022-01-18 05:10:51,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 05:10:51,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:10:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:51,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:10:51,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:51,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:10:52,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:10:52,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:52,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:10:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:10:52,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:52,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 213 [2022-01-18 05:10:53,155 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:53,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:10:53,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:10:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:10:53,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764663649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:53,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:53,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:10:53,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912735845] [2022-01-18 05:10:53,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:53,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:53,281 INFO L87 Difference]: Start difference. First operand 658 states and 2267 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:55,047 INFO L93 Difference]: Finished difference Result 1401 states and 4450 transitions. [2022-01-18 05:10:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:10:55,047 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:10:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:55,049 INFO L225 Difference]: With dead ends: 1401 [2022-01-18 05:10:55,049 INFO L226 Difference]: Without dead ends: 1196 [2022-01-18 05:10:55,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=350, Invalid=3190, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:10:55,050 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 236 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:10:55,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 841 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1863 Invalid, 0 Unknown, 548 Unchecked, 0.7s Time] [2022-01-18 05:10:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-01-18 05:10:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 696. [2022-01-18 05:10:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 3.4287769784172664) internal successors, (2383), 695 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 2383 transitions. [2022-01-18 05:10:55,059 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 2383 transitions. Word has length 23 [2022-01-18 05:10:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:55,059 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 2383 transitions. [2022-01-18 05:10:55,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:10:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 2383 transitions. [2022-01-18 05:10:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:10:55,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:55,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:55,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:55,261 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,SelfDestructingSolverStorable238 [2022-01-18 05:10:55,261 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash -150983109, now seen corresponding path program 223 times [2022-01-18 05:10:55,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:55,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295061106] [2022-01-18 05:10:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:55,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:10:55,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295061106] [2022-01-18 05:10:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295061106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896915142] [2022-01-18 05:10:55,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:10:55,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:55,587 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) [2022-01-18 05:10:55,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 05:10:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:10:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:55,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-01-18 05:10:56,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:10:56,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:56,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-01-18 05:10:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:56,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:57,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:10:57,526 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:57,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 212 [2022-01-18 05:10:57,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-01-18 05:10:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:10:57,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896915142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:57,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:57,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-01-18 05:10:57,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336448833] [2022-01-18 05:10:57,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:57,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:10:57,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:57,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:10:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:10:57,718 INFO L87 Difference]: Start difference. First operand 696 states and 2383 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:03,066 INFO L93 Difference]: Finished difference Result 1701 states and 5247 transitions. [2022-01-18 05:11:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 05:11:03,066 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:03,069 INFO L225 Difference]: With dead ends: 1701 [2022-01-18 05:11:03,069 INFO L226 Difference]: Without dead ends: 1512 [2022-01-18 05:11:03,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1009, Invalid=8303, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 05:11:03,069 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 313 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 686 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:03,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1004 Invalid, 3482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2669 Invalid, 0 Unknown, 686 Unchecked, 1.1s Time] [2022-01-18 05:11:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2022-01-18 05:11:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 732. [2022-01-18 05:11:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.488372093023256) internal successors, (2550), 731 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2550 transitions. [2022-01-18 05:11:03,080 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2550 transitions. Word has length 23 [2022-01-18 05:11:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:03,080 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2550 transitions. [2022-01-18 05:11:03,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2550 transitions. [2022-01-18 05:11:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:03,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:03,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:03,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-18 05:11:03,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:03,282 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1782164497, now seen corresponding path program 224 times [2022-01-18 05:11:03,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:03,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684462753] [2022-01-18 05:11:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:03,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:03,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684462753] [2022-01-18 05:11:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684462753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868015473] [2022-01-18 05:11:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:11:03,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:03,397 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) [2022-01-18 05:11:03,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 05:11:03,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:11:03,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:03,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:03,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 224 [2022-01-18 05:11:04,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:11:04,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:04,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 05:11:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:04,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:04,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:11:05,134 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:05,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 244 [2022-01-18 05:11:05,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 194 [2022-01-18 05:11:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868015473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:05,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:05,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:11:05,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462466417] [2022-01-18 05:11:05,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:05,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:11:05,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:11:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:11:05,289 INFO L87 Difference]: Start difference. First operand 732 states and 2550 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2022-01-18 05:11:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:06,788 INFO L93 Difference]: Finished difference Result 1291 states and 4158 transitions. [2022-01-18 05:11:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:11:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:06,790 INFO L225 Difference]: With dead ends: 1291 [2022-01-18 05:11:06,790 INFO L226 Difference]: Without dead ends: 1169 [2022-01-18 05:11:06,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=337, Invalid=2855, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:11:06,791 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 122 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:06,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 662 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1487 Invalid, 0 Unknown, 285 Unchecked, 0.5s Time] [2022-01-18 05:11:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-18 05:11:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 743. [2022-01-18 05:11:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.4797843665768196) internal successors, (2582), 742 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2582 transitions. [2022-01-18 05:11:06,800 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2582 transitions. Word has length 23 [2022-01-18 05:11:06,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:06,800 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2582 transitions. [2022-01-18 05:11:06,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2022-01-18 05:11:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2582 transitions. [2022-01-18 05:11:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:06,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:06,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:06,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 05:11:07,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:07,002 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash -97398047, now seen corresponding path program 225 times [2022-01-18 05:11:07,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:07,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767138278] [2022-01-18 05:11:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:07,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:07,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:07,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767138278] [2022-01-18 05:11:07,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767138278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:07,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405036458] [2022-01-18 05:11:07,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:11:07,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:07,218 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) [2022-01-18 05:11:07,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 05:11:07,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:11:07,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:07,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 183 [2022-01-18 05:11:07,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:07,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-01-18 05:11:07,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-01-18 05:11:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:08,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:08,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 209 [2022-01-18 05:11:08,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 220 [2022-01-18 05:11:08,790 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:08,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 214 [2022-01-18 05:11:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:08,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405036458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:08,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:08,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-01-18 05:11:08,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640472869] [2022-01-18 05:11:08,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:08,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:11:08,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:08,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:11:08,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:11:08,948 INFO L87 Difference]: Start difference. First operand 743 states and 2582 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:09,562 INFO L93 Difference]: Finished difference Result 1441 states and 4670 transitions. [2022-01-18 05:11:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:11:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:09,564 INFO L225 Difference]: With dead ends: 1441 [2022-01-18 05:11:09,565 INFO L226 Difference]: Without dead ends: 1384 [2022-01-18 05:11:09,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:11:09,565 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 136 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:09,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 330 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-01-18 05:11:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-01-18 05:11:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 830. [2022-01-18 05:11:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4065138721351027) internal successors, (2824), 829 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2824 transitions. [2022-01-18 05:11:09,576 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2824 transitions. Word has length 23 [2022-01-18 05:11:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:09,576 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2824 transitions. [2022-01-18 05:11:09,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2824 transitions. [2022-01-18 05:11:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:09,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:09,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:09,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 05:11:09,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:09,777 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2125947069, now seen corresponding path program 226 times [2022-01-18 05:11:09,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:09,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804604363] [2022-01-18 05:11:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:09,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:09,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804604363] [2022-01-18 05:11:09,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804604363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:09,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574504182] [2022-01-18 05:11:09,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:11:09,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:09,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:09,926 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) [2022-01-18 05:11:09,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 05:11:10,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:11:10,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:10,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:10,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:11:10,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:10,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 189 [2022-01-18 05:11:10,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2022-01-18 05:11:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:11,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:11,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 276 [2022-01-18 05:11:11,689 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:11,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 143 [2022-01-18 05:11:11,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 127 [2022-01-18 05:11:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:11,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574504182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:11,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:11,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:11:11,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774383315] [2022-01-18 05:11:11,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:11,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:11:11,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:11:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:11:11,849 INFO L87 Difference]: Start difference. First operand 830 states and 2824 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:13,001 INFO L93 Difference]: Finished difference Result 1664 states and 5275 transitions. [2022-01-18 05:11:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:11:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:13,004 INFO L225 Difference]: With dead ends: 1664 [2022-01-18 05:11:13,004 INFO L226 Difference]: Without dead ends: 1504 [2022-01-18 05:11:13,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=2107, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:11:13,004 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 195 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:13,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 729 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1165 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2022-01-18 05:11:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-01-18 05:11:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 882. [2022-01-18 05:11:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.383654937570942) internal successors, (2981), 881 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2981 transitions. [2022-01-18 05:11:13,017 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2981 transitions. Word has length 23 [2022-01-18 05:11:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:13,017 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2981 transitions. [2022-01-18 05:11:13,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2981 transitions. [2022-01-18 05:11:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:13,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:13,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:13,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-18 05:11:13,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:13,218 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1620002555, now seen corresponding path program 227 times [2022-01-18 05:11:13,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:13,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111970637] [2022-01-18 05:11:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:13,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:13,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111970637] [2022-01-18 05:11:13,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111970637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305120070] [2022-01-18 05:11:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:11:13,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:13,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:13,415 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) [2022-01-18 05:11:13,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 05:11:13,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:11:13,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:13,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:11:13,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:13,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 208 [2022-01-18 05:11:14,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:11:14,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:14,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:11:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:14,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:14,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-01-18 05:11:15,206 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:15,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2022-01-18 05:11:15,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-01-18 05:11:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:15,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305120070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:15,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:15,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:11:15,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964755452] [2022-01-18 05:11:15,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:15,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:11:15,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:15,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:11:15,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:11:15,356 INFO L87 Difference]: Start difference. First operand 882 states and 2981 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:16,576 INFO L93 Difference]: Finished difference Result 1787 states and 6041 transitions. [2022-01-18 05:11:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:11:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:16,578 INFO L225 Difference]: With dead ends: 1787 [2022-01-18 05:11:16,579 INFO L226 Difference]: Without dead ends: 1704 [2022-01-18 05:11:16,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=2545, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:11:16,579 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 174 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:16,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 619 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 938 Invalid, 0 Unknown, 450 Unchecked, 0.4s Time] [2022-01-18 05:11:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-01-18 05:11:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 894. [2022-01-18 05:11:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.3807390817469205) internal successors, (3019), 893 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3019 transitions. [2022-01-18 05:11:16,591 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3019 transitions. Word has length 23 [2022-01-18 05:11:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 3019 transitions. [2022-01-18 05:11:16,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3019 transitions. [2022-01-18 05:11:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:16,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:16,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:16,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 05:11:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:16,793 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash -408546467, now seen corresponding path program 228 times [2022-01-18 05:11:16,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:16,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291203149] [2022-01-18 05:11:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:16,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:16,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:16,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291203149] [2022-01-18 05:11:16,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291203149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:16,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552807447] [2022-01-18 05:11:16,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:11:16,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:16,899 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) [2022-01-18 05:11:16,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 05:11:17,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:11:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:17,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:17,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-01-18 05:11:17,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:11:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:17,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-01-18 05:11:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:17,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:17,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:11:18,421 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:18,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 275 [2022-01-18 05:11:18,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 221 [2022-01-18 05:11:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:18,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552807447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:18,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:18,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:11:18,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010841136] [2022-01-18 05:11:18,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:11:18,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:11:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:11:18,588 INFO L87 Difference]: Start difference. First operand 894 states and 3019 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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) [2022-01-18 05:11:19,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:19,381 INFO L93 Difference]: Finished difference Result 1652 states and 5419 transitions. [2022-01-18 05:11:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:11:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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 23 [2022-01-18 05:11:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:19,384 INFO L225 Difference]: With dead ends: 1652 [2022-01-18 05:11:19,384 INFO L226 Difference]: Without dead ends: 1593 [2022-01-18 05:11:19,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:11:19,384 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 84 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:19,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 613 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 818 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-01-18 05:11:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-01-18 05:11:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 939. [2022-01-18 05:11:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.3560767590618337) internal successors, (3148), 938 states have internal predecessors, (3148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 3148 transitions. [2022-01-18 05:11:19,397 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 3148 transitions. Word has length 23 [2022-01-18 05:11:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:19,397 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 3148 transitions. [2022-01-18 05:11:19,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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) [2022-01-18 05:11:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 3148 transitions. [2022-01-18 05:11:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:19,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:19,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:19,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 05:11:19,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:19,598 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash -55406977, now seen corresponding path program 229 times [2022-01-18 05:11:19,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:19,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474389056] [2022-01-18 05:11:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:19,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:11:19,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:19,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474389056] [2022-01-18 05:11:19,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474389056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:19,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660288396] [2022-01-18 05:11:19,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:11:19,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:19,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:19,776 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) [2022-01-18 05:11:19,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 05:11:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:20,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-01-18 05:11:20,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:20,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 244 [2022-01-18 05:11:20,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 192 [2022-01-18 05:11:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:20,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:21,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 220 [2022-01-18 05:11:21,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 377 treesize of output 321 [2022-01-18 05:11:21,735 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:21,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 289 [2022-01-18 05:11:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:21,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660288396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:21,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:21,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:11:21,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043301226] [2022-01-18 05:11:21,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:21,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:11:21,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:11:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:11:21,962 INFO L87 Difference]: Start difference. First operand 939 states and 3148 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:23,076 INFO L93 Difference]: Finished difference Result 1414 states and 4449 transitions. [2022-01-18 05:11:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:11:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:23,078 INFO L225 Difference]: With dead ends: 1414 [2022-01-18 05:11:23,078 INFO L226 Difference]: Without dead ends: 1285 [2022-01-18 05:11:23,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:11:23,079 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 184 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:23,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 659 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1132 Invalid, 0 Unknown, 237 Unchecked, 0.4s Time] [2022-01-18 05:11:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-01-18 05:11:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 935. [2022-01-18 05:11:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.356531049250535) internal successors, (3135), 934 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3135 transitions. [2022-01-18 05:11:23,091 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3135 transitions. Word has length 23 [2022-01-18 05:11:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:23,091 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 3135 transitions. [2022-01-18 05:11:23,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3135 transitions. [2022-01-18 05:11:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:23,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:23,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:23,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-18 05:11:23,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 05:11:23,293 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 894269395, now seen corresponding path program 230 times [2022-01-18 05:11:23,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:23,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505641445] [2022-01-18 05:11:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:23,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:23,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505641445] [2022-01-18 05:11:23,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505641445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894154349] [2022-01-18 05:11:23,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:11:23,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:23,427 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) [2022-01-18 05:11:23,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 05:11:23,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:11:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:23,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 213 [2022-01-18 05:11:24,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:24,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 232 [2022-01-18 05:11:24,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 180 [2022-01-18 05:11:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:24,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:24,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 198 [2022-01-18 05:11:25,085 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:25,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 143 [2022-01-18 05:11:25,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 127 [2022-01-18 05:11:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:25,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894154349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:25,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:25,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:11:25,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041793676] [2022-01-18 05:11:25,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:25,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:11:25,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:25,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:11:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:11:25,229 INFO L87 Difference]: Start difference. First operand 935 states and 3135 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:25,556 INFO L93 Difference]: Finished difference Result 1349 states and 4328 transitions. [2022-01-18 05:11:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:11:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:25,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:25,558 INFO L225 Difference]: With dead ends: 1349 [2022-01-18 05:11:25,558 INFO L226 Difference]: Without dead ends: 1260 [2022-01-18 05:11:25,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:11:25,558 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:25,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 255 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 562 Invalid, 0 Unknown, 336 Unchecked, 0.2s Time] [2022-01-18 05:11:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-18 05:11:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 953. [2022-01-18 05:11:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.351890756302521) internal successors, (3191), 952 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3191 transitions. [2022-01-18 05:11:25,569 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3191 transitions. Word has length 23 [2022-01-18 05:11:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:25,569 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3191 transitions. [2022-01-18 05:11:25,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3191 transitions. [2022-01-18 05:11:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:25,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:25,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:25,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-01-18 05:11:25,771 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,SelfDestructingSolverStorable246 [2022-01-18 05:11:25,771 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1393962373, now seen corresponding path program 231 times [2022-01-18 05:11:25,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:25,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061989994] [2022-01-18 05:11:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:25,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:25,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:25,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061989994] [2022-01-18 05:11:25,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061989994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:25,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053133541] [2022-01-18 05:11:25,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:11:25,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:25,869 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) [2022-01-18 05:11:25,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 05:11:26,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:11:26,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:26,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:26,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:26,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 196 [2022-01-18 05:11:26,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:11:26,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:26,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:11:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:27,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 276 [2022-01-18 05:11:27,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 243 [2022-01-18 05:11:27,505 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:27,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 211 [2022-01-18 05:11:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:27,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053133541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:27,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:27,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:11:27,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073078708] [2022-01-18 05:11:27,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:27,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:11:27,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:11:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:11:27,691 INFO L87 Difference]: Start difference. First operand 953 states and 3191 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:27,893 INFO L93 Difference]: Finished difference Result 1276 states and 4128 transitions. [2022-01-18 05:11:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:11:27,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:27,895 INFO L225 Difference]: With dead ends: 1276 [2022-01-18 05:11:27,895 INFO L226 Difference]: Without dead ends: 1215 [2022-01-18 05:11:27,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:11:27,895 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:27,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 308 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 526 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2022-01-18 05:11:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-01-18 05:11:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1027. [2022-01-18 05:11:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.320662768031189) internal successors, (3407), 1026 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3407 transitions. [2022-01-18 05:11:27,907 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3407 transitions. Word has length 23 [2022-01-18 05:11:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:27,907 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 3407 transitions. [2022-01-18 05:11:27,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3407 transitions. [2022-01-18 05:11:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:27,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:27,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:27,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-01-18 05:11:28,109 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,SelfDestructingSolverStorable247 [2022-01-18 05:11:28,109 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1089657063, now seen corresponding path program 232 times [2022-01-18 05:11:28,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:28,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580689053] [2022-01-18 05:11:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:28,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:11:28,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580689053] [2022-01-18 05:11:28,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580689053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556414432] [2022-01-18 05:11:28,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:11:28,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:28,261 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) [2022-01-18 05:11:28,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 05:11:28,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:11:28,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:28,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:28,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 250 [2022-01-18 05:11:29,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:11:29,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:29,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-01-18 05:11:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:29,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:29,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:11:29,902 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:29,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 212 [2022-01-18 05:11:29,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 174 [2022-01-18 05:11:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:30,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556414432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:30,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:30,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 05:11:30,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054867699] [2022-01-18 05:11:30,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:30,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:11:30,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:11:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:11:30,038 INFO L87 Difference]: Start difference. First operand 1027 states and 3407 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:11:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:30,701 INFO L93 Difference]: Finished difference Result 1805 states and 5755 transitions. [2022-01-18 05:11:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:11:30,701 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 23 [2022-01-18 05:11:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:30,704 INFO L225 Difference]: With dead ends: 1805 [2022-01-18 05:11:30,704 INFO L226 Difference]: Without dead ends: 1715 [2022-01-18 05:11:30,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:11:30,704 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:30,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 429 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 798 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-01-18 05:11:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-01-18 05:11:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1053. [2022-01-18 05:11:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.30893536121673) internal successors, (3481), 1052 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3481 transitions. [2022-01-18 05:11:30,717 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3481 transitions. Word has length 23 [2022-01-18 05:11:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:30,717 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3481 transitions. [2022-01-18 05:11:30,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:11:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3481 transitions. [2022-01-18 05:11:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:30,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:30,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:30,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-01-18 05:11:30,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:30,919 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2146574085, now seen corresponding path program 233 times [2022-01-18 05:11:30,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761480600] [2022-01-18 05:11:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:30,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:31,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:31,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761480600] [2022-01-18 05:11:31,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761480600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:31,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62449691] [2022-01-18 05:11:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:11:31,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:31,016 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) [2022-01-18 05:11:31,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 05:11:31,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:11:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:11:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:31,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 169 [2022-01-18 05:11:31,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:31,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 161 [2022-01-18 05:11:31,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-01-18 05:11:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:32,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:32,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-01-18 05:11:32,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 285 [2022-01-18 05:11:32,880 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:32,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 254 [2022-01-18 05:11:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:33,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62449691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:33,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:33,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 05:11:33,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969162794] [2022-01-18 05:11:33,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:33,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:11:33,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:11:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:11:33,051 INFO L87 Difference]: Start difference. First operand 1053 states and 3481 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 05:11:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:33,846 INFO L93 Difference]: Finished difference Result 1689 states and 5372 transitions. [2022-01-18 05:11:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:11:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:33,849 INFO L225 Difference]: With dead ends: 1689 [2022-01-18 05:11:33,849 INFO L226 Difference]: Without dead ends: 1625 [2022-01-18 05:11:33,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:11:33,849 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:33,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 912 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1074 Invalid, 0 Unknown, 402 Unchecked, 0.4s Time] [2022-01-18 05:11:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-01-18 05:11:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1119. [2022-01-18 05:11:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.2871198568872986) internal successors, (3675), 1118 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3675 transitions. [2022-01-18 05:11:33,862 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3675 transitions. Word has length 23 [2022-01-18 05:11:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:33,862 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3675 transitions. [2022-01-18 05:11:33,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 05:11:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3675 transitions. [2022-01-18 05:11:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:33,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:33,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:33,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-01-18 05:11:34,064 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,SelfDestructingSolverStorable249 [2022-01-18 05:11:34,064 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 323438229, now seen corresponding path program 234 times [2022-01-18 05:11:34,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:34,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979162204] [2022-01-18 05:11:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:34,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:34,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979162204] [2022-01-18 05:11:34,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979162204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960516678] [2022-01-18 05:11:34,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:11:34,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:34,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:34,157 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) [2022-01-18 05:11:34,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 05:11:34,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:11:34,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:34,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:34,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-01-18 05:11:34,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:11:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:34,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 05:11:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:35,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-01-18 05:11:35,650 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:35,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2022-01-18 05:11:35,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 153 [2022-01-18 05:11:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:35,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960516678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:35,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:35,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:11:35,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309323383] [2022-01-18 05:11:35,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:35,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:11:35,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:11:35,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:11:35,767 INFO L87 Difference]: Start difference. First operand 1119 states and 3675 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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) [2022-01-18 05:11:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:36,349 INFO L93 Difference]: Finished difference Result 1900 states and 6212 transitions. [2022-01-18 05:11:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:11:36,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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 23 [2022-01-18 05:11:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:36,353 INFO L225 Difference]: With dead ends: 1900 [2022-01-18 05:11:36,353 INFO L226 Difference]: Without dead ends: 1802 [2022-01-18 05:11:36,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:11:36,353 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 90 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:36,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 462 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 609 Invalid, 0 Unknown, 227 Unchecked, 0.2s Time] [2022-01-18 05:11:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-01-18 05:11:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1147. [2022-01-18 05:11:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.283595113438045) internal successors, (3763), 1146 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3763 transitions. [2022-01-18 05:11:36,377 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3763 transitions. Word has length 23 [2022-01-18 05:11:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 3763 transitions. [2022-01-18 05:11:36,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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) [2022-01-18 05:11:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3763 transitions. [2022-01-18 05:11:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:36,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:36,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:36,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-18 05:11:36,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:36,579 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 676577719, now seen corresponding path program 235 times [2022-01-18 05:11:36,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:36,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227351344] [2022-01-18 05:11:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:36,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:11:36,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:36,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227351344] [2022-01-18 05:11:36,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227351344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:36,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397407598] [2022-01-18 05:11:36,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:11:36,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:36,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:36,763 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) [2022-01-18 05:11:36,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 05:11:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:37,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 250 [2022-01-18 05:11:37,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:11:37,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:37,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:11:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:38,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-01-18 05:11:38,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 173 [2022-01-18 05:11:38,427 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:38,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 161 [2022-01-18 05:11:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:38,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397407598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:38,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:38,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:11:38,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427057785] [2022-01-18 05:11:38,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:38,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:11:38,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:11:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:11:38,567 INFO L87 Difference]: Start difference. First operand 1147 states and 3763 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:39,648 INFO L93 Difference]: Finished difference Result 1791 states and 5683 transitions. [2022-01-18 05:11:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:11:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:39,650 INFO L225 Difference]: With dead ends: 1791 [2022-01-18 05:11:39,650 INFO L226 Difference]: Without dead ends: 1684 [2022-01-18 05:11:39,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:11:39,651 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 132 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:39,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 680 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1069 Invalid, 0 Unknown, 366 Unchecked, 0.4s Time] [2022-01-18 05:11:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2022-01-18 05:11:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1157. [2022-01-18 05:11:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.2811418685121105) internal successors, (3793), 1156 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3793 transitions. [2022-01-18 05:11:39,664 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3793 transitions. Word has length 23 [2022-01-18 05:11:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:39,664 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 3793 transitions. [2022-01-18 05:11:39,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3793 transitions. [2022-01-18 05:11:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:39,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:39,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:39,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-01-18 05:11:39,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:39,866 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:39,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1678921, now seen corresponding path program 236 times [2022-01-18 05:11:39,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:39,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129290159] [2022-01-18 05:11:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:39,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129290159] [2022-01-18 05:11:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129290159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585194501] [2022-01-18 05:11:39,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:11:39,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:39,970 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) [2022-01-18 05:11:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 05:11:40,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:11:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:40,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:11:40,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:11:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:40,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:11:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:41,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-01-18 05:11:41,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 373 treesize of output 317 [2022-01-18 05:11:41,685 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:41,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 285 [2022-01-18 05:11:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:41,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585194501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:41,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:41,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:11:41,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752605391] [2022-01-18 05:11:41,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:41,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:11:41,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:11:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:11:41,860 INFO L87 Difference]: Start difference. First operand 1157 states and 3793 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:11:42,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:42,005 INFO L93 Difference]: Finished difference Result 1345 states and 4324 transitions. [2022-01-18 05:11:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:11:42,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 23 [2022-01-18 05:11:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:42,008 INFO L225 Difference]: With dead ends: 1345 [2022-01-18 05:11:42,008 INFO L226 Difference]: Without dead ends: 1323 [2022-01-18 05:11:42,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:11:42,008 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:42,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 190 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-18 05:11:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-01-18 05:11:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1152. [2022-01-18 05:11:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.281494352736751) internal successors, (3777), 1151 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 3777 transitions. [2022-01-18 05:11:42,020 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 3777 transitions. Word has length 23 [2022-01-18 05:11:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:42,020 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 3777 transitions. [2022-01-18 05:11:42,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:11:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 3777 transitions. [2022-01-18 05:11:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:42,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:42,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:42,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-01-18 05:11:42,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:42,222 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2024087217, now seen corresponding path program 237 times [2022-01-18 05:11:42,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:42,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703398278] [2022-01-18 05:11:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:42,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:42,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:42,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703398278] [2022-01-18 05:11:42,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703398278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:42,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484319678] [2022-01-18 05:11:42,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:11:42,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:42,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:42,334 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) [2022-01-18 05:11:42,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 05:11:42,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:11:42,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:42,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:42,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:42,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 211 [2022-01-18 05:11:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:43,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-01-18 05:11:43,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-01-18 05:11:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:43,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:43,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 213 [2022-01-18 05:11:44,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 272 [2022-01-18 05:11:44,038 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:44,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 240 [2022-01-18 05:11:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:44,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484319678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:44,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:44,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 05:11:44,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125375656] [2022-01-18 05:11:44,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:44,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:11:44,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:11:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:11:44,241 INFO L87 Difference]: Start difference. First operand 1152 states and 3777 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:45,242 INFO L93 Difference]: Finished difference Result 1940 states and 6070 transitions. [2022-01-18 05:11:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:11:45,242 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:45,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:45,245 INFO L225 Difference]: With dead ends: 1940 [2022-01-18 05:11:45,245 INFO L226 Difference]: Without dead ends: 1872 [2022-01-18 05:11:45,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=2187, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:11:45,246 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:45,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 867 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1288 Invalid, 0 Unknown, 238 Unchecked, 0.4s Time] [2022-01-18 05:11:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-01-18 05:11:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1197. [2022-01-18 05:11:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.270903010033445) internal successors, (3912), 1196 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3912 transitions. [2022-01-18 05:11:45,260 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3912 transitions. Word has length 23 [2022-01-18 05:11:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:45,260 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 3912 transitions. [2022-01-18 05:11:45,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3912 transitions. [2022-01-18 05:11:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:45,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:45,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:45,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-18 05:11:45,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:45,462 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:45,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1973857221, now seen corresponding path program 238 times [2022-01-18 05:11:45,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998329663] [2022-01-18 05:11:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:45,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:45,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998329663] [2022-01-18 05:11:45,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998329663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161832017] [2022-01-18 05:11:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:11:45,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:45,620 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) [2022-01-18 05:11:45,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 05:11:45,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:11:45,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:45,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:45,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:46,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 269 [2022-01-18 05:11:46,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:46,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 199 [2022-01-18 05:11:46,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 157 [2022-01-18 05:11:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:46,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:47,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 259 [2022-01-18 05:11:47,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 175 [2022-01-18 05:11:47,537 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:47,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 163 [2022-01-18 05:11:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:47,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161832017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:47,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:47,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:11:47,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048922519] [2022-01-18 05:11:47,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:47,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:11:47,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:11:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:11:47,687 INFO L87 Difference]: Start difference. First operand 1197 states and 3912 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:48,728 INFO L93 Difference]: Finished difference Result 1968 states and 6271 transitions. [2022-01-18 05:11:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:11:48,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:48,731 INFO L225 Difference]: With dead ends: 1968 [2022-01-18 05:11:48,731 INFO L226 Difference]: Without dead ends: 1851 [2022-01-18 05:11:48,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=2376, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:11:48,732 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 155 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:48,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 635 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1212 Invalid, 0 Unknown, 260 Unchecked, 0.4s Time] [2022-01-18 05:11:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-01-18 05:11:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1251. [2022-01-18 05:11:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.2688) internal successors, (4086), 1250 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4086 transitions. [2022-01-18 05:11:48,747 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4086 transitions. Word has length 23 [2022-01-18 05:11:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:48,747 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 4086 transitions. [2022-01-18 05:11:48,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4086 transitions. [2022-01-18 05:11:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:48,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:48,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:48,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 05:11:48,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:48,954 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:48,954 INFO L85 PathProgramCache]: Analyzing trace with hash 857246503, now seen corresponding path program 239 times [2022-01-18 05:11:48,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:48,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536263552] [2022-01-18 05:11:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:48,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:49,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:49,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536263552] [2022-01-18 05:11:49,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536263552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:49,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612269898] [2022-01-18 05:11:49,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:11:49,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:49,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:49,048 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) [2022-01-18 05:11:49,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 05:11:49,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:11:49,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:11:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:49,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:11:49,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:49,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 233 [2022-01-18 05:11:49,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-01-18 05:11:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:50,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:50,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 231 [2022-01-18 05:11:50,884 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:50,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:11:50,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:11:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:51,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612269898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:51,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:51,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 05:11:51,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320842459] [2022-01-18 05:11:51,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:51,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:11:51,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:11:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:11:51,078 INFO L87 Difference]: Start difference. First operand 1251 states and 4086 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:51,499 INFO L93 Difference]: Finished difference Result 1796 states and 5655 transitions. [2022-01-18 05:11:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:11:51,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:51,504 INFO L225 Difference]: With dead ends: 1796 [2022-01-18 05:11:51,504 INFO L226 Difference]: Without dead ends: 1758 [2022-01-18 05:11:51,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:11:51,505 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:51,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 392 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 595 Invalid, 0 Unknown, 411 Unchecked, 0.2s Time] [2022-01-18 05:11:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-01-18 05:11:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1318. [2022-01-18 05:11:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.2672741078208047) internal successors, (4303), 1317 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4303 transitions. [2022-01-18 05:11:51,524 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4303 transitions. Word has length 23 [2022-01-18 05:11:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:51,525 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 4303 transitions. [2022-01-18 05:11:51,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4303 transitions. [2022-01-18 05:11:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:51,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:51,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:51,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 05:11:51,728 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,SelfDestructingSolverStorable255 [2022-01-18 05:11:51,729 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash 188566481, now seen corresponding path program 240 times [2022-01-18 05:11:51,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:51,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304170535] [2022-01-18 05:11:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:51,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:51,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304170535] [2022-01-18 05:11:51,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304170535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75400171] [2022-01-18 05:11:51,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:11:51,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:51,819 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) [2022-01-18 05:11:51,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 05:11:52,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:11:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:52,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:11:52,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:52,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-01-18 05:11:52,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-01-18 05:11:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:52,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:53,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 196 [2022-01-18 05:11:53,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-01-18 05:11:53,495 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:53,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-01-18 05:11:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:53,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75400171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:53,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:53,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:11:53,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181144286] [2022-01-18 05:11:53,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:53,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:11:53,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:53,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:11:53,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:11:53,659 INFO L87 Difference]: Start difference. First operand 1318 states and 4303 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) [2022-01-18 05:11:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:53,834 INFO L93 Difference]: Finished difference Result 1717 states and 5510 transitions. [2022-01-18 05:11:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:11:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:53,837 INFO L225 Difference]: With dead ends: 1717 [2022-01-18 05:11:53,837 INFO L226 Difference]: Without dead ends: 1661 [2022-01-18 05:11:53,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:11:53,837 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:53,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 247 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 356 Invalid, 0 Unknown, 238 Unchecked, 0.1s Time] [2022-01-18 05:11:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-18 05:11:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1378. [2022-01-18 05:11:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.262890341321714) internal successors, (4493), 1377 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4493 transitions. [2022-01-18 05:11:53,852 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4493 transitions. Word has length 23 [2022-01-18 05:11:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 4493 transitions. [2022-01-18 05:11:53,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) [2022-01-18 05:11:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4493 transitions. [2022-01-18 05:11:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:53,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:53,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:53,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-01-18 05:11:54,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 05:11:54,054 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash 417063447, now seen corresponding path program 241 times [2022-01-18 05:11:54,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:54,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506745216] [2022-01-18 05:11:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:54,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:54,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506745216] [2022-01-18 05:11:54,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506745216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478442667] [2022-01-18 05:11:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:11:54,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:54,141 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) [2022-01-18 05:11:54,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 05:11:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:54,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-01-18 05:11:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:54,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-01-18 05:11:54,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-01-18 05:11:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:55,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:55,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:11:55,601 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:55,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:11:55,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:11:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:55,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478442667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:55,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:55,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:11:55,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057507008] [2022-01-18 05:11:55,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:55,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:11:55,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:11:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:11:55,735 INFO L87 Difference]: Start difference. First operand 1378 states and 4493 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:55,896 INFO L93 Difference]: Finished difference Result 1764 states and 5612 transitions. [2022-01-18 05:11:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:11:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:55,899 INFO L225 Difference]: With dead ends: 1764 [2022-01-18 05:11:55,899 INFO L226 Difference]: Without dead ends: 1742 [2022-01-18 05:11:55,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:11:55,900 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:55,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 206 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 344 Unchecked, 0.1s Time] [2022-01-18 05:11:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-01-18 05:11:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1392. [2022-01-18 05:11:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2566498921639107) internal successors, (4530), 1391 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4530 transitions. [2022-01-18 05:11:55,916 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4530 transitions. Word has length 23 [2022-01-18 05:11:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:55,916 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4530 transitions. [2022-01-18 05:11:55,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4530 transitions. [2022-01-18 05:11:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:55,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:55,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:55,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 05:11:56,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 05:11:56,118 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1554430441, now seen corresponding path program 242 times [2022-01-18 05:11:56,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:56,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729572185] [2022-01-18 05:11:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:56,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:11:56,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:56,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729572185] [2022-01-18 05:11:56,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729572185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:56,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804136370] [2022-01-18 05:11:56,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:11:56,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:56,284 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) [2022-01-18 05:11:56,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 05:11:56,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:11:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:11:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:56,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-01-18 05:11:57,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:11:57,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:11:57,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:11:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:57,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:11:57,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:11:57,846 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:11:57,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:11:57,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:11:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:11:58,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804136370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:11:58,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:11:58,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:11:58,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412994802] [2022-01-18 05:11:58,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:11:58,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:11:58,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:11:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:11:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:11:58,015 INFO L87 Difference]: Start difference. First operand 1392 states and 4530 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 05:11:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:11:59,121 INFO L93 Difference]: Finished difference Result 1968 states and 6251 transitions. [2022-01-18 05:11:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:11:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:11:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:11:59,124 INFO L225 Difference]: With dead ends: 1968 [2022-01-18 05:11:59,124 INFO L226 Difference]: Without dead ends: 1939 [2022-01-18 05:11:59,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=2346, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:11:59,124 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 129 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:11:59,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 556 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 741 Invalid, 0 Unknown, 522 Unchecked, 0.3s Time] [2022-01-18 05:11:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-01-18 05:11:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1423. [2022-01-18 05:11:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.2587904360056257) internal successors, (4634), 1422 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:11:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4634 transitions. [2022-01-18 05:11:59,141 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4634 transitions. Word has length 23 [2022-01-18 05:11:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:11:59,141 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 4634 transitions. [2022-01-18 05:11:59,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 05:11:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4634 transitions. [2022-01-18 05:11:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:11:59,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:11:59,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:11:59,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-01-18 05:11:59,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:59,343 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:11:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:11:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 693758389, now seen corresponding path program 243 times [2022-01-18 05:11:59,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:11:59,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870651380] [2022-01-18 05:11:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:11:59,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:11:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:11:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:11:59,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:11:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870651380] [2022-01-18 05:11:59,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870651380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:11:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035828011] [2022-01-18 05:11:59,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:11:59,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:11:59,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:11:59,520 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) [2022-01-18 05:11:59,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 05:11:59,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:11:59,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:11:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:11:59,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:11:59,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:12:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:00,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 300 [2022-01-18 05:12:00,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 259 [2022-01-18 05:12:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:00,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:01,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 239 [2022-01-18 05:12:01,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-01-18 05:12:01,623 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:01,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-01-18 05:12:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:01,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035828011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:01,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:01,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:12:01,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822876637] [2022-01-18 05:12:01,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:01,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:12:01,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:01,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:12:01,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:12:01,787 INFO L87 Difference]: Start difference. First operand 1423 states and 4634 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:06,367 INFO L93 Difference]: Finished difference Result 2989 states and 9011 transitions. [2022-01-18 05:12:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 05:12:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:06,371 INFO L225 Difference]: With dead ends: 2989 [2022-01-18 05:12:06,371 INFO L226 Difference]: Without dead ends: 2770 [2022-01-18 05:12:06,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1255, Invalid=9457, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 05:12:06,372 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 387 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1095 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:06,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1011 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1469 Invalid, 0 Unknown, 1095 Unchecked, 0.6s Time] [2022-01-18 05:12:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2022-01-18 05:12:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1613. [2022-01-18 05:12:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 3.2574441687344913) internal successors, (5251), 1612 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 5251 transitions. [2022-01-18 05:12:06,398 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 5251 transitions. Word has length 23 [2022-01-18 05:12:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:06,398 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 5251 transitions. [2022-01-18 05:12:06,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 5251 transitions. [2022-01-18 05:12:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:06,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:06,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:06,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-01-18 05:12:06,600 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,SelfDestructingSolverStorable259 [2022-01-18 05:12:06,600 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash -560191471, now seen corresponding path program 244 times [2022-01-18 05:12:06,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:06,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951073338] [2022-01-18 05:12:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:06,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:06,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951073338] [2022-01-18 05:12:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951073338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079380610] [2022-01-18 05:12:06,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:12:06,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:06,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:06,736 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) [2022-01-18 05:12:06,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 05:12:06,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:12:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:07,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 243 [2022-01-18 05:12:07,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 218 [2022-01-18 05:12:07,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:07,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 212 [2022-01-18 05:12:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:08,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:08,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 198 [2022-01-18 05:12:08,578 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:08,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:12:08,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:12:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:08,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079380610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:08,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:08,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:12:08,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986588346] [2022-01-18 05:12:08,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:08,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:12:08,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:12:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:12:08,697 INFO L87 Difference]: Start difference. First operand 1613 states and 5251 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:09,641 INFO L93 Difference]: Finished difference Result 2320 states and 7324 transitions. [2022-01-18 05:12:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:12:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:09,645 INFO L225 Difference]: With dead ends: 2320 [2022-01-18 05:12:09,645 INFO L226 Difference]: Without dead ends: 2270 [2022-01-18 05:12:09,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:12:09,645 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 149 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:09,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 686 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1054 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2022-01-18 05:12:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2022-01-18 05:12:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1619. [2022-01-18 05:12:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.2527812113720644) internal successors, (5263), 1618 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5263 transitions. [2022-01-18 05:12:09,667 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5263 transitions. Word has length 23 [2022-01-18 05:12:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:09,667 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 5263 transitions. [2022-01-18 05:12:09,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5263 transitions. [2022-01-18 05:12:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:09,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:09,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:09,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-18 05:12:09,869 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,SelfDestructingSolverStorable260 [2022-01-18 05:12:09,869 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash 735285179, now seen corresponding path program 245 times [2022-01-18 05:12:09,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:09,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477800266] [2022-01-18 05:12:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:09,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:10,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:10,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477800266] [2022-01-18 05:12:10,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477800266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:10,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209127425] [2022-01-18 05:12:10,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:12:10,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:10,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:10,004 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) [2022-01-18 05:12:10,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 05:12:10,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:12:10,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:10,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:12:10,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:11,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:11,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2022-01-18 05:12:11,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 222 [2022-01-18 05:12:11,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:11,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 194 [2022-01-18 05:12:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:12,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:12,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:12:12,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 76 [2022-01-18 05:12:12,928 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:12,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 210 [2022-01-18 05:12:12,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 172 [2022-01-18 05:12:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:13,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209127425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:13,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:13,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 28 [2022-01-18 05:12:13,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140938547] [2022-01-18 05:12:13,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:13,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:12:13,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:12:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:12:13,068 INFO L87 Difference]: Start difference. First operand 1619 states and 5263 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:15,234 INFO L93 Difference]: Finished difference Result 2547 states and 8093 transitions. [2022-01-18 05:12:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:12:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:15,238 INFO L225 Difference]: With dead ends: 2547 [2022-01-18 05:12:15,238 INFO L226 Difference]: Without dead ends: 2523 [2022-01-18 05:12:15,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=495, Invalid=4061, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 05:12:15,239 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 152 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:15,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 797 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1533 Invalid, 0 Unknown, 367 Unchecked, 0.6s Time] [2022-01-18 05:12:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2022-01-18 05:12:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1629. [2022-01-18 05:12:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.2598280098280097) internal successors, (5307), 1628 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5307 transitions. [2022-01-18 05:12:15,262 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5307 transitions. Word has length 23 [2022-01-18 05:12:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:15,262 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5307 transitions. [2022-01-18 05:12:15,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5307 transitions. [2022-01-18 05:12:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:15,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:15,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:15,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 05:12:15,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:15,465 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash 478511741, now seen corresponding path program 246 times [2022-01-18 05:12:15,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:15,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687256551] [2022-01-18 05:12:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:15,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:15,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:15,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687256551] [2022-01-18 05:12:15,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687256551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:15,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795384352] [2022-01-18 05:12:15,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:12:15,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:15,587 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) [2022-01-18 05:12:15,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 05:12:15,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:12:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:12:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:16,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:16,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 257 [2022-01-18 05:12:17,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:17,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 72 [2022-01-18 05:12:17,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2022-01-18 05:12:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:17,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:18,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:12:18,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 373 treesize of output 343 [2022-01-18 05:12:18,866 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:18,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 173 [2022-01-18 05:12:18,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 152 [2022-01-18 05:12:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795384352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:19,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:19,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 34 [2022-01-18 05:12:19,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560414594] [2022-01-18 05:12:19,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:19,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:12:19,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:12:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:12:19,045 INFO L87 Difference]: Start difference. First operand 1629 states and 5307 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:19,568 INFO L93 Difference]: Finished difference Result 1863 states and 6010 transitions. [2022-01-18 05:12:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:12:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:19,571 INFO L225 Difference]: With dead ends: 1863 [2022-01-18 05:12:19,571 INFO L226 Difference]: Without dead ends: 1840 [2022-01-18 05:12:19,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:12:19,572 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 640 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:19,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 436 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 500 Invalid, 0 Unknown, 640 Unchecked, 0.2s Time] [2022-01-18 05:12:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-01-18 05:12:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1632. [2022-01-18 05:12:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.258736971183323) internal successors, (5315), 1631 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5315 transitions. [2022-01-18 05:12:19,589 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5315 transitions. Word has length 23 [2022-01-18 05:12:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:19,589 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5315 transitions. [2022-01-18 05:12:19,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5315 transitions. [2022-01-18 05:12:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:19,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:19,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:19,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-01-18 05:12:19,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:19,791 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash -232090229, now seen corresponding path program 247 times [2022-01-18 05:12:19,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:19,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368252975] [2022-01-18 05:12:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:19,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:19,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368252975] [2022-01-18 05:12:19,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368252975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915186838] [2022-01-18 05:12:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:12:19,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:19,952 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) [2022-01-18 05:12:19,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 05:12:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:12:20,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:20,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-01-18 05:12:20,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:20,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 05:12:20,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-01-18 05:12:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:21,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:21,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-01-18 05:12:21,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 243 [2022-01-18 05:12:21,870 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:21,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 211 [2022-01-18 05:12:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:22,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915186838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:22,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:22,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:12:22,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612384984] [2022-01-18 05:12:22,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:22,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:12:22,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:12:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:12:22,041 INFO L87 Difference]: Start difference. First operand 1632 states and 5315 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:22,737 INFO L93 Difference]: Finished difference Result 2284 states and 7096 transitions. [2022-01-18 05:12:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:12:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:22,740 INFO L225 Difference]: With dead ends: 2284 [2022-01-18 05:12:22,740 INFO L226 Difference]: Without dead ends: 1817 [2022-01-18 05:12:22,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:12:22,740 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 164 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:22,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 478 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 867 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-01-18 05:12:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-01-18 05:12:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1632. [2022-01-18 05:12:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.2378908645003066) internal successors, (5281), 1631 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5281 transitions. [2022-01-18 05:12:22,758 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5281 transitions. Word has length 23 [2022-01-18 05:12:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:22,759 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5281 transitions. [2022-01-18 05:12:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5281 transitions. [2022-01-18 05:12:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:22,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:22,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:22,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-18 05:12:22,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:22,961 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:22,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1844204739, now seen corresponding path program 248 times [2022-01-18 05:12:22,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:22,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167157731] [2022-01-18 05:12:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:22,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:23,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167157731] [2022-01-18 05:12:23,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167157731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940336175] [2022-01-18 05:12:23,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:12:23,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:23,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:23,082 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) [2022-01-18 05:12:23,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 05:12:23,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:12:23,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:23,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 347 treesize of output 291 [2022-01-18 05:12:24,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:24,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-01-18 05:12:24,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-01-18 05:12:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:24,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:24,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-01-18 05:12:24,909 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:24,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:12:24,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:12:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940336175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:25,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:12:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302093723] [2022-01-18 05:12:25,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:25,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:12:25,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:12:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:12:25,081 INFO L87 Difference]: Start difference. First operand 1632 states and 5281 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:25,628 INFO L93 Difference]: Finished difference Result 2173 states and 6856 transitions. [2022-01-18 05:12:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:12:25,629 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:25,632 INFO L225 Difference]: With dead ends: 2173 [2022-01-18 05:12:25,632 INFO L226 Difference]: Without dead ends: 2154 [2022-01-18 05:12:25,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:12:25,632 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 638 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:25,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 493 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 695 Invalid, 0 Unknown, 638 Unchecked, 0.2s Time] [2022-01-18 05:12:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-01-18 05:12:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1640. [2022-01-18 05:12:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.2342892007321535) internal successors, (5301), 1639 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5301 transitions. [2022-01-18 05:12:25,652 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5301 transitions. Word has length 23 [2022-01-18 05:12:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:25,652 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 5301 transitions. [2022-01-18 05:12:25,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5301 transitions. [2022-01-18 05:12:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:25,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:25,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:25,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-18 05:12:25,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:25,855 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash 308053179, now seen corresponding path program 249 times [2022-01-18 05:12:25,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:25,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116817089] [2022-01-18 05:12:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:25,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:25,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116817089] [2022-01-18 05:12:25,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116817089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876531032] [2022-01-18 05:12:25,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:12:25,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:25,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:25,957 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) [2022-01-18 05:12:25,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 05:12:26,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:12:26,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:26,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:26,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-01-18 05:12:26,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:26,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 05:12:26,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-01-18 05:12:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:26,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:27,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-01-18 05:12:27,501 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:27,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:12:27,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:12:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:27,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876531032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:27,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:27,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:12:27,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423240480] [2022-01-18 05:12:27,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:27,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:12:27,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:12:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:12:27,673 INFO L87 Difference]: Start difference. First operand 1640 states and 5301 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:12:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:27,983 INFO L93 Difference]: Finished difference Result 2035 states and 6397 transitions. [2022-01-18 05:12:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:12:27,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 23 [2022-01-18 05:12:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:27,986 INFO L225 Difference]: With dead ends: 2035 [2022-01-18 05:12:27,986 INFO L226 Difference]: Without dead ends: 2013 [2022-01-18 05:12:27,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:12:27,987 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:27,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 298 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 605 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-01-18 05:12:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2022-01-18 05:12:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1667. [2022-01-18 05:12:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.221488595438175) internal successors, (5367), 1666 states have internal predecessors, (5367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5367 transitions. [2022-01-18 05:12:28,006 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5367 transitions. Word has length 23 [2022-01-18 05:12:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:28,006 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 5367 transitions. [2022-01-18 05:12:28,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:12:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5367 transitions. [2022-01-18 05:12:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:28,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:28,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:28,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-01-18 05:12:28,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 05:12:28,209 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:28,209 INFO L85 PathProgramCache]: Analyzing trace with hash -134845961, now seen corresponding path program 250 times [2022-01-18 05:12:28,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:28,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10450153] [2022-01-18 05:12:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:28,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:28,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10450153] [2022-01-18 05:12:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10450153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406245072] [2022-01-18 05:12:28,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:12:28,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:28,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:28,302 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) [2022-01-18 05:12:28,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 05:12:28,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:12:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:28,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:28,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:12:29,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:29,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 195 [2022-01-18 05:12:29,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 153 [2022-01-18 05:12:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:29,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:29,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-01-18 05:12:30,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-01-18 05:12:30,023 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:30,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-01-18 05:12:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:30,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406245072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:30,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:30,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:12:30,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634268466] [2022-01-18 05:12:30,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:30,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:12:30,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:12:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:12:30,188 INFO L87 Difference]: Start difference. First operand 1667 states and 5367 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:12:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:30,490 INFO L93 Difference]: Finished difference Result 2012 states and 6307 transitions. [2022-01-18 05:12:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:12:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 23 [2022-01-18 05:12:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:30,493 INFO L225 Difference]: With dead ends: 2012 [2022-01-18 05:12:30,493 INFO L226 Difference]: Without dead ends: 1996 [2022-01-18 05:12:30,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:12:30,493 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 90 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:30,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 289 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 619 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-01-18 05:12:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2022-01-18 05:12:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1674. [2022-01-18 05:12:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.217573221757322) internal successors, (5383), 1673 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5383 transitions. [2022-01-18 05:12:30,512 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5383 transitions. Word has length 23 [2022-01-18 05:12:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:30,513 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 5383 transitions. [2022-01-18 05:12:30,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:12:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5383 transitions. [2022-01-18 05:12:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:30,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:30,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:30,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-01-18 05:12:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-01-18 05:12:30,715 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash -945896681, now seen corresponding path program 251 times [2022-01-18 05:12:30,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:30,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613421026] [2022-01-18 05:12:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:30,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:30,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:30,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613421026] [2022-01-18 05:12:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613421026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:30,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733656976] [2022-01-18 05:12:30,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:12:30,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:30,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:30,805 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) [2022-01-18 05:12:30,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 05:12:31,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:12:31,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:31,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:12:31,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:12:31,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:31,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:12:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:31,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:32,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 263 [2022-01-18 05:12:32,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-01-18 05:12:32,555 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:32,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-01-18 05:12:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:32,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733656976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:32,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:32,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:12:32,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031075901] [2022-01-18 05:12:32,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:32,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:12:32,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:12:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:12:32,709 INFO L87 Difference]: Start difference. First operand 1674 states and 5383 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:32,875 INFO L93 Difference]: Finished difference Result 2051 states and 6447 transitions. [2022-01-18 05:12:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:12:32,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:32,879 INFO L225 Difference]: With dead ends: 2051 [2022-01-18 05:12:32,879 INFO L226 Difference]: Without dead ends: 2035 [2022-01-18 05:12:32,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:12:32,879 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:32,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 218 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-01-18 05:12:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-01-18 05:12:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1678. [2022-01-18 05:12:32,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.2152653548002386) internal successors, (5392), 1677 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5392 transitions. [2022-01-18 05:12:32,913 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5392 transitions. Word has length 23 [2022-01-18 05:12:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:32,913 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 5392 transitions. [2022-01-18 05:12:32,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5392 transitions. [2022-01-18 05:12:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:32,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:32,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:32,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-01-18 05:12:33,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:33,115 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1377576727, now seen corresponding path program 252 times [2022-01-18 05:12:33,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:33,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595088512] [2022-01-18 05:12:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:33,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:33,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595088512] [2022-01-18 05:12:33,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595088512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484701709] [2022-01-18 05:12:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:12:33,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:33,278 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) [2022-01-18 05:12:33,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 05:12:33,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:12:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:33,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:12:34,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:12:34,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:34,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:12:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:34,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:34,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 248 [2022-01-18 05:12:35,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 232 [2022-01-18 05:12:35,096 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:35,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 202 [2022-01-18 05:12:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:35,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484701709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:35,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:35,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:12:35,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108334466] [2022-01-18 05:12:35,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:35,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:12:35,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:12:35,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:12:35,284 INFO L87 Difference]: Start difference. First operand 1678 states and 5392 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 05:12:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:36,241 INFO L93 Difference]: Finished difference Result 2173 states and 6712 transitions. [2022-01-18 05:12:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:12:36,241 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:36,244 INFO L225 Difference]: With dead ends: 2173 [2022-01-18 05:12:36,245 INFO L226 Difference]: Without dead ends: 2127 [2022-01-18 05:12:36,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:12:36,245 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:36,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 469 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 763 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-01-18 05:12:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-01-18 05:12:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1682. [2022-01-18 05:12:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 3.2129684711481263) internal successors, (5401), 1681 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 5401 transitions. [2022-01-18 05:12:36,266 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 5401 transitions. Word has length 23 [2022-01-18 05:12:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:36,266 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 5401 transitions. [2022-01-18 05:12:36,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 05:12:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 5401 transitions. [2022-01-18 05:12:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:36,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:36,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:36,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-01-18 05:12:36,468 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,SelfDestructingSolverStorable268 [2022-01-18 05:12:36,469 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2040595503, now seen corresponding path program 253 times [2022-01-18 05:12:36,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:36,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008129211] [2022-01-18 05:12:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:36,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:36,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:36,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008129211] [2022-01-18 05:12:36,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008129211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:36,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754414882] [2022-01-18 05:12:36,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:12:36,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:36,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:36,652 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) [2022-01-18 05:12:36,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 05:12:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:12:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:37,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-01-18 05:12:37,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:37,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 282 [2022-01-18 05:12:37,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 242 [2022-01-18 05:12:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:38,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:38,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:12:38,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-01-18 05:12:38,823 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:38,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 199 [2022-01-18 05:12:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:38,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754414882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:38,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:38,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:12:38,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050009239] [2022-01-18 05:12:38,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:38,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:12:38,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:12:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:12:38,989 INFO L87 Difference]: Start difference. First operand 1682 states and 5401 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:40,448 INFO L93 Difference]: Finished difference Result 2317 states and 7185 transitions. [2022-01-18 05:12:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:12:40,448 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:40,451 INFO L225 Difference]: With dead ends: 2317 [2022-01-18 05:12:40,452 INFO L226 Difference]: Without dead ends: 2271 [2022-01-18 05:12:40,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:12:40,452 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 127 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:40,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 787 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1733 Invalid, 0 Unknown, 145 Unchecked, 0.6s Time] [2022-01-18 05:12:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-01-18 05:12:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1702. [2022-01-18 05:12:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.202821869488536) internal successors, (5448), 1701 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 5448 transitions. [2022-01-18 05:12:40,472 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 5448 transitions. Word has length 23 [2022-01-18 05:12:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:40,472 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 5448 transitions. [2022-01-18 05:12:40,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 5448 transitions. [2022-01-18 05:12:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:40,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:40,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:40,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 05:12:40,674 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,SelfDestructingSolverStorable269 [2022-01-18 05:12:40,674 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash -293114143, now seen corresponding path program 254 times [2022-01-18 05:12:40,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:40,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338431711] [2022-01-18 05:12:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:40,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:40,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:40,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338431711] [2022-01-18 05:12:40,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338431711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:40,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796795979] [2022-01-18 05:12:40,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:12:40,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:40,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:40,803 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) [2022-01-18 05:12:40,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 05:12:41,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:12:41,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:41,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:41,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:12:41,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:41,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 240 [2022-01-18 05:12:41,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 186 [2022-01-18 05:12:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:42,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 213 [2022-01-18 05:12:42,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 243 [2022-01-18 05:12:42,682 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:42,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 211 [2022-01-18 05:12:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:42,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796795979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:42,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:42,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 05:12:42,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350483386] [2022-01-18 05:12:42,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:42,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:12:42,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:12:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:12:42,862 INFO L87 Difference]: Start difference. First operand 1702 states and 5448 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2022-01-18 05:12:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:43,394 INFO L93 Difference]: Finished difference Result 2233 states and 6934 transitions. [2022-01-18 05:12:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:12:43,394 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 23 [2022-01-18 05:12:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:43,397 INFO L225 Difference]: With dead ends: 2233 [2022-01-18 05:12:43,397 INFO L226 Difference]: Without dead ends: 2204 [2022-01-18 05:12:43,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:12:43,398 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:43,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 390 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 480 Invalid, 0 Unknown, 655 Unchecked, 0.2s Time] [2022-01-18 05:12:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-01-18 05:12:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1688. [2022-01-18 05:12:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.20746887966805) internal successors, (5411), 1687 states have internal predecessors, (5411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5411 transitions. [2022-01-18 05:12:43,418 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5411 transitions. Word has length 23 [2022-01-18 05:12:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:43,418 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5411 transitions. [2022-01-18 05:12:43,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2022-01-18 05:12:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5411 transitions. [2022-01-18 05:12:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:43,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:43,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:43,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 05:12:43,620 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,SelfDestructingSolverStorable270 [2022-01-18 05:12:43,620 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash -966438973, now seen corresponding path program 255 times [2022-01-18 05:12:43,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:43,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567020804] [2022-01-18 05:12:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:43,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:43,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567020804] [2022-01-18 05:12:43,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567020804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:43,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150781371] [2022-01-18 05:12:43,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:12:43,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:43,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:43,744 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) [2022-01-18 05:12:43,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 05:12:44,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:12:44,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:44,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:44,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-01-18 05:12:44,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:44,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 238 [2022-01-18 05:12:44,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 200 [2022-01-18 05:12:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:44,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:44,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-01-18 05:12:45,492 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:45,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 263 [2022-01-18 05:12:45,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 217 [2022-01-18 05:12:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:45,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150781371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:45,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:45,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-01-18 05:12:45,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533803762] [2022-01-18 05:12:45,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:45,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:12:45,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:12:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:12:45,634 INFO L87 Difference]: Start difference. First operand 1688 states and 5411 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:47,232 INFO L93 Difference]: Finished difference Result 2596 states and 8035 transitions. [2022-01-18 05:12:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:12:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:47,237 INFO L225 Difference]: With dead ends: 2596 [2022-01-18 05:12:47,237 INFO L226 Difference]: Without dead ends: 2566 [2022-01-18 05:12:47,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:12:47,238 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 125 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 709 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:47,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 785 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1322 Invalid, 0 Unknown, 709 Unchecked, 0.5s Time] [2022-01-18 05:12:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2022-01-18 05:12:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1689. [2022-01-18 05:12:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 3.2067535545023698) internal successors, (5413), 1688 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5413 transitions. [2022-01-18 05:12:47,261 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5413 transitions. Word has length 23 [2022-01-18 05:12:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:47,261 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 5413 transitions. [2022-01-18 05:12:47,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5413 transitions. [2022-01-18 05:12:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:47,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:47,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:47,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-01-18 05:12:47,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:47,467 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1978366905, now seen corresponding path program 256 times [2022-01-18 05:12:47,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281798319] [2022-01-18 05:12:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:47,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:47,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281798319] [2022-01-18 05:12:47,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281798319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638555079] [2022-01-18 05:12:47,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:12:47,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:47,624 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) [2022-01-18 05:12:47,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 05:12:47,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:12:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:47,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:12:48,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:48,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 187 [2022-01-18 05:12:48,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 145 [2022-01-18 05:12:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:48,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:48,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-01-18 05:12:49,232 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:49,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:12:49,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:12:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:49,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638555079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:49,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:49,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 05:12:49,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094135987] [2022-01-18 05:12:49,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:49,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:12:49,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:12:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:12:49,386 INFO L87 Difference]: Start difference. First operand 1689 states and 5413 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:50,559 INFO L93 Difference]: Finished difference Result 2553 states and 8074 transitions. [2022-01-18 05:12:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:12:50,560 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:50,564 INFO L225 Difference]: With dead ends: 2553 [2022-01-18 05:12:50,564 INFO L226 Difference]: Without dead ends: 2420 [2022-01-18 05:12:50,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:12:50,564 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 173 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:50,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 617 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1095 Invalid, 0 Unknown, 295 Unchecked, 0.4s Time] [2022-01-18 05:12:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-01-18 05:12:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1749. [2022-01-18 05:12:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.2048054919908466) internal successors, (5602), 1748 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5602 transitions. [2022-01-18 05:12:50,585 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5602 transitions. Word has length 23 [2022-01-18 05:12:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:50,586 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 5602 transitions. [2022-01-18 05:12:50,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5602 transitions. [2022-01-18 05:12:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:50,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:50,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:50,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-01-18 05:12:50,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:50,788 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash -969090893, now seen corresponding path program 257 times [2022-01-18 05:12:50,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:50,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682902997] [2022-01-18 05:12:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:50,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:50,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:50,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682902997] [2022-01-18 05:12:50,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682902997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:50,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097709630] [2022-01-18 05:12:50,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:12:50,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:50,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:50,886 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) [2022-01-18 05:12:50,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 05:12:51,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:12:51,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:12:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:51,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 237 [2022-01-18 05:12:51,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:12:51,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:51,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:12:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:52,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:52,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-01-18 05:12:52,770 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:52,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:12:52,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:12:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:12:52,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097709630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:52,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:52,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:12:52,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735671746] [2022-01-18 05:12:52,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:52,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:12:52,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:52,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:12:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:12:52,937 INFO L87 Difference]: Start difference. First operand 1749 states and 5602 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:53,420 INFO L93 Difference]: Finished difference Result 2721 states and 8444 transitions. [2022-01-18 05:12:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:12:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:53,425 INFO L225 Difference]: With dead ends: 2721 [2022-01-18 05:12:53,425 INFO L226 Difference]: Without dead ends: 2421 [2022-01-18 05:12:53,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:12:53,425 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 143 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:53,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 334 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 676 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-01-18 05:12:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-01-18 05:12:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2009. [2022-01-18 05:12:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.1633466135458166) internal successors, (6352), 2008 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6352 transitions. [2022-01-18 05:12:53,451 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6352 transitions. Word has length 23 [2022-01-18 05:12:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:53,451 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 6352 transitions. [2022-01-18 05:12:53,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6352 transitions. [2022-01-18 05:12:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:53,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:53,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:53,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-01-18 05:12:53,654 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,SelfDestructingSolverStorable273 [2022-01-18 05:12:53,654 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:53,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:53,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1069698957, now seen corresponding path program 258 times [2022-01-18 05:12:53,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:53,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797772781] [2022-01-18 05:12:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:53,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:53,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797772781] [2022-01-18 05:12:53,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797772781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929320726] [2022-01-18 05:12:53,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:12:53,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:53,792 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) [2022-01-18 05:12:53,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 05:12:54,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:12:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:12:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:12:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:54,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-01-18 05:12:54,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:54,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 265 [2022-01-18 05:12:54,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 235 [2022-01-18 05:12:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:54,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:55,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:12:55,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:12:55,446 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:55,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 05:12:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:55,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929320726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:55,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:55,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-01-18 05:12:55,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415676858] [2022-01-18 05:12:55,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:55,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:12:55,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:12:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:12:55,523 INFO L87 Difference]: Start difference. First operand 2009 states and 6352 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:12:56,220 INFO L93 Difference]: Finished difference Result 2952 states and 9000 transitions. [2022-01-18 05:12:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:12:56,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:12:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:12:56,225 INFO L225 Difference]: With dead ends: 2952 [2022-01-18 05:12:56,225 INFO L226 Difference]: Without dead ends: 2889 [2022-01-18 05:12:56,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:12:56,226 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:12:56,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 479 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 792 Invalid, 0 Unknown, 404 Unchecked, 0.3s Time] [2022-01-18 05:12:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2022-01-18 05:12:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2202. [2022-01-18 05:12:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.1549295774647885) internal successors, (6944), 2201 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6944 transitions. [2022-01-18 05:12:56,251 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6944 transitions. Word has length 23 [2022-01-18 05:12:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:12:56,251 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 6944 transitions. [2022-01-18 05:12:56,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:12:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6944 transitions. [2022-01-18 05:12:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:12:56,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:12:56,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:12:56,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-18 05:12:56,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:56,454 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:12:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:12:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash -799004779, now seen corresponding path program 259 times [2022-01-18 05:12:56,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:12:56,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437937449] [2022-01-18 05:12:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:12:56,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:12:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:12:56,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:12:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437937449] [2022-01-18 05:12:56,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437937449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:12:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430678868] [2022-01-18 05:12:56,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:12:56,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:12:56,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:12:56,555 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) [2022-01-18 05:12:56,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 05:12:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:12:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:12:56,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:12:56,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:12:57,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:12:57,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:12:57,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:12:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:57,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:12:58,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 293 [2022-01-18 05:12:58,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-01-18 05:12:58,641 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:12:58,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-01-18 05:12:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:12:58,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430678868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:12:58,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:12:58,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:12:58,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729446200] [2022-01-18 05:12:58,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:12:58,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:12:58,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:12:58,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:12:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:12:58,813 INFO L87 Difference]: Start difference. First operand 2202 states and 6944 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:02,003 INFO L93 Difference]: Finished difference Result 4411 states and 12930 transitions. [2022-01-18 05:13:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 05:13:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:02,009 INFO L225 Difference]: With dead ends: 4411 [2022-01-18 05:13:02,009 INFO L226 Difference]: Without dead ends: 4290 [2022-01-18 05:13:02,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1115, Invalid=9391, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 05:13:02,010 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 188 mSDsluCounter, 2138 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1482 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:02,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1065 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1152 Invalid, 0 Unknown, 1482 Unchecked, 0.4s Time] [2022-01-18 05:13:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2022-01-18 05:13:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 2363. [2022-01-18 05:13:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2362 states have (on average 3.1227773073666385) internal successors, (7376), 2362 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 7376 transitions. [2022-01-18 05:13:02,057 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 7376 transitions. Word has length 23 [2022-01-18 05:13:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:02,057 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 7376 transitions. [2022-01-18 05:13:02,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 7376 transitions. [2022-01-18 05:13:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:02,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:02,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:02,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-01-18 05:13:02,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:02,260 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash 321971773, now seen corresponding path program 260 times [2022-01-18 05:13:02,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:02,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123452750] [2022-01-18 05:13:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:02,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:02,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:02,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123452750] [2022-01-18 05:13:02,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123452750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670484414] [2022-01-18 05:13:02,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:13:02,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:02,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:02,350 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) [2022-01-18 05:13:02,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 05:13:02,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:13:02,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:13:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:02,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-01-18 05:13:03,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:13:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:03,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 125 [2022-01-18 05:13:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:03,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:03,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 211 [2022-01-18 05:13:04,149 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:04,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 216 [2022-01-18 05:13:04,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 179 [2022-01-18 05:13:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:04,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670484414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:04,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:04,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:13:04,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319360261] [2022-01-18 05:13:04,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:04,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:13:04,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:13:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:04,303 INFO L87 Difference]: Start difference. First operand 2363 states and 7376 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:13:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:05,547 INFO L93 Difference]: Finished difference Result 3281 states and 9813 transitions. [2022-01-18 05:13:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 05:13:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 23 [2022-01-18 05:13:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:05,552 INFO L225 Difference]: With dead ends: 3281 [2022-01-18 05:13:05,552 INFO L226 Difference]: Without dead ends: 3186 [2022-01-18 05:13:05,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=2568, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:13:05,553 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 122 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:05,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 865 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1459 Invalid, 0 Unknown, 412 Unchecked, 0.5s Time] [2022-01-18 05:13:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2022-01-18 05:13:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2398. [2022-01-18 05:13:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.108886107634543) internal successors, (7452), 2397 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7452 transitions. [2022-01-18 05:13:05,582 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7452 transitions. Word has length 23 [2022-01-18 05:13:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:05,582 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 7452 transitions. [2022-01-18 05:13:05,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 05:13:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7452 transitions. [2022-01-18 05:13:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:05,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:05,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:05,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-18 05:13:05,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:05,785 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash -277403401, now seen corresponding path program 261 times [2022-01-18 05:13:05,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:05,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241407768] [2022-01-18 05:13:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:05,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:05,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:05,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241407768] [2022-01-18 05:13:05,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241407768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:05,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918147176] [2022-01-18 05:13:05,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:13:05,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:05,875 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) [2022-01-18 05:13:05,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 05:13:06,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:13:06,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:06,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 243 [2022-01-18 05:13:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:06,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-01-18 05:13:06,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-01-18 05:13:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:06,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:07,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 198 [2022-01-18 05:13:07,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 182 [2022-01-18 05:13:07,489 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:07,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 170 [2022-01-18 05:13:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:07,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918147176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:07,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:07,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:13:07,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710549000] [2022-01-18 05:13:07,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:07,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:13:07,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:13:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:13:07,668 INFO L87 Difference]: Start difference. First operand 2398 states and 7452 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:07,815 INFO L93 Difference]: Finished difference Result 2616 states and 8086 transitions. [2022-01-18 05:13:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:13:07,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:07,819 INFO L225 Difference]: With dead ends: 2616 [2022-01-18 05:13:07,819 INFO L226 Difference]: Without dead ends: 2585 [2022-01-18 05:13:07,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:07,820 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:07,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 224 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 362 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-01-18 05:13:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-01-18 05:13:07,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2400. [2022-01-18 05:13:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 3.1096290120883703) internal successors, (7460), 2399 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7460 transitions. [2022-01-18 05:13:07,847 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7460 transitions. Word has length 23 [2022-01-18 05:13:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:07,847 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7460 transitions. [2022-01-18 05:13:07,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7460 transitions. [2022-01-18 05:13:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:07,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:07,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:07,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-18 05:13:08,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-01-18 05:13:08,050 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash -310640325, now seen corresponding path program 262 times [2022-01-18 05:13:08,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:08,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551173166] [2022-01-18 05:13:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:08,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:08,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551173166] [2022-01-18 05:13:08,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551173166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987982482] [2022-01-18 05:13:08,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:13:08,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:08,140 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) [2022-01-18 05:13:08,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 05:13:08,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:13:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:08,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 196 [2022-01-18 05:13:08,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:13:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:08,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:13:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:09,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:09,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:13:09,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-01-18 05:13:09,600 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:09,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-01-18 05:13:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:09,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987982482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:09,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:09,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:13:09,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906686370] [2022-01-18 05:13:09,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:09,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:13:09,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:09,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:13:09,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:09,745 INFO L87 Difference]: Start difference. First operand 2400 states and 7460 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:09,950 INFO L93 Difference]: Finished difference Result 2770 states and 8560 transitions. [2022-01-18 05:13:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:13:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:09,954 INFO L225 Difference]: With dead ends: 2770 [2022-01-18 05:13:09,954 INFO L226 Difference]: Without dead ends: 2694 [2022-01-18 05:13:09,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:13:09,954 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 110 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:09,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 234 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 435 Invalid, 0 Unknown, 360 Unchecked, 0.1s Time] [2022-01-18 05:13:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2022-01-18 05:13:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2420. [2022-01-18 05:13:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 3.107069036792063) internal successors, (7516), 2419 states have internal predecessors, (7516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7516 transitions. [2022-01-18 05:13:09,981 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7516 transitions. Word has length 23 [2022-01-18 05:13:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:09,981 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 7516 transitions. [2022-01-18 05:13:09,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7516 transitions. [2022-01-18 05:13:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:09,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:09,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:10,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-01-18 05:13:10,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-18 05:13:10,184 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1036869173, now seen corresponding path program 263 times [2022-01-18 05:13:10,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:10,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189709681] [2022-01-18 05:13:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:10,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:10,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189709681] [2022-01-18 05:13:10,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189709681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876758686] [2022-01-18 05:13:10,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:13:10,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:10,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:10,283 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) [2022-01-18 05:13:10,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 05:13:10,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:13:10,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:10,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:13:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:10,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 195 [2022-01-18 05:13:11,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:11,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 235 [2022-01-18 05:13:11,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 191 [2022-01-18 05:13:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:11,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:11,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-01-18 05:13:12,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:13:12,275 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:12,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 05:13:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:12,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876758686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:12,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:12,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:13:12,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456076358] [2022-01-18 05:13:12,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:12,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:13:12,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:13:12,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:12,426 INFO L87 Difference]: Start difference. First operand 2420 states and 7516 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:16,049 INFO L93 Difference]: Finished difference Result 4946 states and 14558 transitions. [2022-01-18 05:13:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 05:13:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:16,056 INFO L225 Difference]: With dead ends: 4946 [2022-01-18 05:13:16,056 INFO L226 Difference]: Without dead ends: 4731 [2022-01-18 05:13:16,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1276, Invalid=12530, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 05:13:16,057 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 244 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:16,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1034 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1849 Invalid, 0 Unknown, 467 Unchecked, 0.7s Time] [2022-01-18 05:13:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2022-01-18 05:13:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 1905. [2022-01-18 05:13:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.138655462184874) internal successors, (5976), 1904 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 5976 transitions. [2022-01-18 05:13:16,091 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 5976 transitions. Word has length 23 [2022-01-18 05:13:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:16,091 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 5976 transitions. [2022-01-18 05:13:16,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 5976 transitions. [2022-01-18 05:13:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:16,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:16,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:16,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 05:13:16,294 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,SelfDestructingSolverStorable279 [2022-01-18 05:13:16,294 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:16,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1977952887, now seen corresponding path program 264 times [2022-01-18 05:13:16,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:16,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933684732] [2022-01-18 05:13:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:16,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:16,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:16,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933684732] [2022-01-18 05:13:16,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933684732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:16,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065785357] [2022-01-18 05:13:16,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:13:16,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:16,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:16,458 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) [2022-01-18 05:13:16,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 05:13:16,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:13:16,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:16,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:16,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 245 [2022-01-18 05:13:17,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:17,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-01-18 05:13:17,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-01-18 05:13:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:17,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:17,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-01-18 05:13:18,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 272 [2022-01-18 05:13:18,200 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:18,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 240 [2022-01-18 05:13:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:18,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065785357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:18,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:18,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:13:18,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924742236] [2022-01-18 05:13:18,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:18,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:13:18,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:18,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:13:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:13:18,381 INFO L87 Difference]: Start difference. First operand 1905 states and 5976 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 05:13:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:20,251 INFO L93 Difference]: Finished difference Result 3422 states and 10432 transitions. [2022-01-18 05:13:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:13:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:20,256 INFO L225 Difference]: With dead ends: 3422 [2022-01-18 05:13:20,256 INFO L226 Difference]: Without dead ends: 3255 [2022-01-18 05:13:20,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=389, Invalid=3033, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:13:20,257 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 167 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:20,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 776 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1319 Invalid, 0 Unknown, 561 Unchecked, 0.5s Time] [2022-01-18 05:13:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-01-18 05:13:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2034. [2022-01-18 05:13:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 3.1200196753566156) internal successors, (6343), 2033 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 6343 transitions. [2022-01-18 05:13:20,284 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 6343 transitions. Word has length 23 [2022-01-18 05:13:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:20,285 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 6343 transitions. [2022-01-18 05:13:20,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2022-01-18 05:13:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 6343 transitions. [2022-01-18 05:13:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:20,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:20,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:20,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-18 05:13:20,487 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,SelfDestructingSolverStorable280 [2022-01-18 05:13:20,487 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -809658257, now seen corresponding path program 265 times [2022-01-18 05:13:20,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964382799] [2022-01-18 05:13:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:20,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:20,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:20,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964382799] [2022-01-18 05:13:20,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964382799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:20,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957668986] [2022-01-18 05:13:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:13:20,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:20,611 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) [2022-01-18 05:13:20,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 05:13:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:20,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:21,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 239 [2022-01-18 05:13:21,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:13:21,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:21,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2022-01-18 05:13:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:21,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:21,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-01-18 05:13:22,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-01-18 05:13:22,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:22,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 202 [2022-01-18 05:13:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:22,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957668986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:22,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:22,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:13:22,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926926251] [2022-01-18 05:13:22,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:22,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:13:22,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:13:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:13:22,484 INFO L87 Difference]: Start difference. First operand 2034 states and 6343 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:23,146 INFO L93 Difference]: Finished difference Result 2658 states and 8171 transitions. [2022-01-18 05:13:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:13:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:23,150 INFO L225 Difference]: With dead ends: 2658 [2022-01-18 05:13:23,150 INFO L226 Difference]: Without dead ends: 2558 [2022-01-18 05:13:23,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:13:23,150 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 159 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:23,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 326 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 912 Invalid, 0 Unknown, 287 Unchecked, 0.3s Time] [2022-01-18 05:13:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2022-01-18 05:13:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2085. [2022-01-18 05:13:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 3.1501919385796544) internal successors, (6565), 2084 states have internal predecessors, (6565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 6565 transitions. [2022-01-18 05:13:23,173 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 6565 transitions. Word has length 23 [2022-01-18 05:13:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:23,173 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 6565 transitions. [2022-01-18 05:13:23,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 6565 transitions. [2022-01-18 05:13:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:23,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:23,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:23,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-01-18 05:13:23,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:23,376 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash 866346175, now seen corresponding path program 266 times [2022-01-18 05:13:23,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:23,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025362792] [2022-01-18 05:13:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:23,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:23,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025362792] [2022-01-18 05:13:23,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025362792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:23,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884467309] [2022-01-18 05:13:23,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:13:23,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:23,476 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) [2022-01-18 05:13:23,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 05:13:23,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:13:23,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:23,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:13:24,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 176 [2022-01-18 05:13:24,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:24,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 180 [2022-01-18 05:13:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:24,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:24,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 198 [2022-01-18 05:13:25,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-01-18 05:13:25,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:25,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 209 [2022-01-18 05:13:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:25,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884467309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:25,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:25,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:13:25,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040347103] [2022-01-18 05:13:25,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:25,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:13:25,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:13:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:13:25,420 INFO L87 Difference]: Start difference. First operand 2085 states and 6565 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:25,707 INFO L93 Difference]: Finished difference Result 2479 states and 7654 transitions. [2022-01-18 05:13:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:13:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:25,712 INFO L225 Difference]: With dead ends: 2479 [2022-01-18 05:13:25,712 INFO L226 Difference]: Without dead ends: 2391 [2022-01-18 05:13:25,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:25,712 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:25,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 264 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 636 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-18 05:13:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-01-18 05:13:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2122. [2022-01-18 05:13:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 3.1532296086751535) internal successors, (6688), 2121 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 6688 transitions. [2022-01-18 05:13:25,738 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 6688 transitions. Word has length 23 [2022-01-18 05:13:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:25,738 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 6688 transitions. [2022-01-18 05:13:25,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 6688 transitions. [2022-01-18 05:13:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:25,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:25,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:25,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-18 05:13:25,941 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,SelfDestructingSolverStorable282 [2022-01-18 05:13:25,941 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash -892942965, now seen corresponding path program 267 times [2022-01-18 05:13:25,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:25,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103199420] [2022-01-18 05:13:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:25,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:26,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103199420] [2022-01-18 05:13:26,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103199420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:26,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150745681] [2022-01-18 05:13:26,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:13:26,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:26,043 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) [2022-01-18 05:13:26,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 05:13:26,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:13:26,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:13:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:26,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 265 [2022-01-18 05:13:27,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:27,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 198 [2022-01-18 05:13:27,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 170 [2022-01-18 05:13:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:27,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:27,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-01-18 05:13:28,107 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:28,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 252 [2022-01-18 05:13:28,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 207 [2022-01-18 05:13:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:28,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150745681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:28,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:28,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:13:28,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542856309] [2022-01-18 05:13:28,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:28,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:13:28,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:13:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:28,295 INFO L87 Difference]: Start difference. First operand 2122 states and 6688 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:29,287 INFO L93 Difference]: Finished difference Result 2806 states and 8769 transitions. [2022-01-18 05:13:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:13:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:29,292 INFO L225 Difference]: With dead ends: 2806 [2022-01-18 05:13:29,292 INFO L226 Difference]: Without dead ends: 2666 [2022-01-18 05:13:29,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:13:29,292 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 144 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:29,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 679 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1024 Invalid, 0 Unknown, 210 Unchecked, 0.4s Time] [2022-01-18 05:13:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2022-01-18 05:13:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2147. [2022-01-18 05:13:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.1612301957129545) internal successors, (6784), 2146 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6784 transitions. [2022-01-18 05:13:29,315 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6784 transitions. Word has length 23 [2022-01-18 05:13:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:29,316 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 6784 transitions. [2022-01-18 05:13:29,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6784 transitions. [2022-01-18 05:13:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:29,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:29,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:29,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 05:13:29,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:29,518 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1074695619, now seen corresponding path program 268 times [2022-01-18 05:13:29,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:29,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447121002] [2022-01-18 05:13:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:29,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:29,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447121002] [2022-01-18 05:13:29,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447121002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205413644] [2022-01-18 05:13:29,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:13:29,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:29,624 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) [2022-01-18 05:13:29,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 05:13:29,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:13:29,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:29,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:29,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:13:30,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:30,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-01-18 05:13:30,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-01-18 05:13:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:30,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:30,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-01-18 05:13:31,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:31,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 179 [2022-01-18 05:13:31,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:13:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:31,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205413644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:31,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:31,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:13:31,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098277811] [2022-01-18 05:13:31,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:31,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:13:31,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:31,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:13:31,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:13:31,582 INFO L87 Difference]: Start difference. First operand 2147 states and 6784 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-01-18 05:13:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:32,079 INFO L93 Difference]: Finished difference Result 2587 states and 8004 transitions. [2022-01-18 05:13:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:13:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 23 [2022-01-18 05:13:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:32,084 INFO L225 Difference]: With dead ends: 2587 [2022-01-18 05:13:32,084 INFO L226 Difference]: Without dead ends: 2540 [2022-01-18 05:13:32,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:13:32,084 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 125 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:32,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 281 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 827 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-01-18 05:13:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-01-18 05:13:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2156. [2022-01-18 05:13:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.1638051044083526) internal successors, (6818), 2155 states have internal predecessors, (6818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 6818 transitions. [2022-01-18 05:13:32,111 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 6818 transitions. Word has length 23 [2022-01-18 05:13:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:32,111 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 6818 transitions. [2022-01-18 05:13:32,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-01-18 05:13:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 6818 transitions. [2022-01-18 05:13:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:32,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:32,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:32,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-01-18 05:13:32,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:32,314 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash -846198653, now seen corresponding path program 269 times [2022-01-18 05:13:32,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:32,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820856148] [2022-01-18 05:13:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:32,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:32,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820856148] [2022-01-18 05:13:32,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820856148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175619242] [2022-01-18 05:13:32,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:13:32,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:32,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:32,421 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) [2022-01-18 05:13:32,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 05:13:32,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:13:32,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:32,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:13:33,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:33,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 246 [2022-01-18 05:13:33,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 194 [2022-01-18 05:13:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:33,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:33,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 218 [2022-01-18 05:13:34,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-01-18 05:13:34,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:34,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 200 [2022-01-18 05:13:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:34,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175619242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:34,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:34,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:13:34,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905333101] [2022-01-18 05:13:34,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:34,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:13:34,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:13:34,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:34,485 INFO L87 Difference]: Start difference. First operand 2156 states and 6818 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:34,786 INFO L93 Difference]: Finished difference Result 2621 states and 8084 transitions. [2022-01-18 05:13:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:13:34,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:34,790 INFO L225 Difference]: With dead ends: 2621 [2022-01-18 05:13:34,790 INFO L226 Difference]: Without dead ends: 2537 [2022-01-18 05:13:34,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:13:34,790 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:34,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 269 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 698 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-01-18 05:13:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-01-18 05:13:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2145. [2022-01-18 05:13:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.1613805970149254) internal successors, (6778), 2144 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 6778 transitions. [2022-01-18 05:13:34,813 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 6778 transitions. Word has length 23 [2022-01-18 05:13:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:34,813 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 6778 transitions. [2022-01-18 05:13:34,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 6778 transitions. [2022-01-18 05:13:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:34,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:34,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:34,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-01-18 05:13:35,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:35,016 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2030290795, now seen corresponding path program 270 times [2022-01-18 05:13:35,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:35,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354953233] [2022-01-18 05:13:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:35,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:35,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354953233] [2022-01-18 05:13:35,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354953233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541694900] [2022-01-18 05:13:35,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:13:35,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:35,115 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) [2022-01-18 05:13:35,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 05:13:35,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:13:35,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:35,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 213 [2022-01-18 05:13:35,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:35,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-01-18 05:13:35,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-01-18 05:13:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:36,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:36,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 194 [2022-01-18 05:13:36,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-01-18 05:13:36,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:36,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 200 [2022-01-18 05:13:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:36,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541694900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:36,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:36,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:13:36,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229020315] [2022-01-18 05:13:36,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:36,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:13:36,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:13:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:13:36,901 INFO L87 Difference]: Start difference. First operand 2145 states and 6778 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:37,257 INFO L93 Difference]: Finished difference Result 2527 states and 7796 transitions. [2022-01-18 05:13:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:13:37,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:37,261 INFO L225 Difference]: With dead ends: 2527 [2022-01-18 05:13:37,261 INFO L226 Difference]: Without dead ends: 2469 [2022-01-18 05:13:37,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:13:37,261 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:37,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 380 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 755 Invalid, 0 Unknown, 373 Unchecked, 0.3s Time] [2022-01-18 05:13:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-01-18 05:13:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2165. [2022-01-18 05:13:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 3.1589648798521255) internal successors, (6836), 2164 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6836 transitions. [2022-01-18 05:13:37,284 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6836 transitions. Word has length 23 [2022-01-18 05:13:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:37,284 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 6836 transitions. [2022-01-18 05:13:37,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6836 transitions. [2022-01-18 05:13:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:37,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:37,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:37,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-18 05:13:37,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:37,487 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1012219861, now seen corresponding path program 271 times [2022-01-18 05:13:37,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:37,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632121141] [2022-01-18 05:13:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:37,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:37,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:37,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632121141] [2022-01-18 05:13:37,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632121141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:37,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798981740] [2022-01-18 05:13:37,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:13:37,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:37,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:37,580 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) [2022-01-18 05:13:37,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 05:13:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:37,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:13:37,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:37,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 206 [2022-01-18 05:13:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:38,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 239 [2022-01-18 05:13:38,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 199 [2022-01-18 05:13:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:38,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:39,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 207 [2022-01-18 05:13:39,441 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:39,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 224 [2022-01-18 05:13:39,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2022-01-18 05:13:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:39,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798981740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:39,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:39,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:13:39,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529759263] [2022-01-18 05:13:39,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:39,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:13:39,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:39,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:13:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:39,635 INFO L87 Difference]: Start difference. First operand 2165 states and 6836 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:40,763 INFO L93 Difference]: Finished difference Result 3015 states and 9303 transitions. [2022-01-18 05:13:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:13:40,763 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:40,768 INFO L225 Difference]: With dead ends: 3015 [2022-01-18 05:13:40,768 INFO L226 Difference]: Without dead ends: 2957 [2022-01-18 05:13:40,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=268, Invalid=2384, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:13:40,768 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 104 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:40,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 746 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1373 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-01-18 05:13:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-01-18 05:13:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2192. [2022-01-18 05:13:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 3.1547238703788225) internal successors, (6912), 2191 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 6912 transitions. [2022-01-18 05:13:40,794 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 6912 transitions. Word has length 23 [2022-01-18 05:13:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 2192 states and 6912 transitions. [2022-01-18 05:13:40,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 6912 transitions. [2022-01-18 05:13:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:40,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:40,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:40,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-01-18 05:13:40,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-01-18 05:13:40,997 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash -80373479, now seen corresponding path program 272 times [2022-01-18 05:13:40,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:40,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162786894] [2022-01-18 05:13:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:40,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:41,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:41,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162786894] [2022-01-18 05:13:41,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162786894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:41,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450076331] [2022-01-18 05:13:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:13:41,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:41,107 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) [2022-01-18 05:13:41,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 05:13:41,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:13:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:41,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:41,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:13:41,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-01-18 05:13:41,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:41,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 191 [2022-01-18 05:13:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:42,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:42,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 272 [2022-01-18 05:13:42,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:42,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 152 [2022-01-18 05:13:42,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 127 [2022-01-18 05:13:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:43,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450076331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:43,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:43,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:13:43,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953874263] [2022-01-18 05:13:43,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:43,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:13:43,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:13:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:13:43,092 INFO L87 Difference]: Start difference. First operand 2192 states and 6912 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:43,758 INFO L93 Difference]: Finished difference Result 2984 states and 9211 transitions. [2022-01-18 05:13:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:13:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:43,763 INFO L225 Difference]: With dead ends: 2984 [2022-01-18 05:13:43,763 INFO L226 Difference]: Without dead ends: 2837 [2022-01-18 05:13:43,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:13:43,763 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 253 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:43,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 306 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 981 Invalid, 0 Unknown, 95 Unchecked, 0.4s Time] [2022-01-18 05:13:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2022-01-18 05:13:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 2258. [2022-01-18 05:13:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2257 states have (on average 3.1922906513070446) internal successors, (7205), 2257 states have internal predecessors, (7205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 7205 transitions. [2022-01-18 05:13:43,792 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 7205 transitions. Word has length 23 [2022-01-18 05:13:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:43,792 INFO L470 AbstractCegarLoop]: Abstraction has 2258 states and 7205 transitions. [2022-01-18 05:13:43,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 7205 transitions. [2022-01-18 05:13:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:43,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:43,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:43,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-01-18 05:13:43,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-18 05:13:43,995 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1580868817, now seen corresponding path program 273 times [2022-01-18 05:13:43,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:43,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004947819] [2022-01-18 05:13:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:43,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:13:44,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004947819] [2022-01-18 05:13:44,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004947819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589070039] [2022-01-18 05:13:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:13:44,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:44,111 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) [2022-01-18 05:13:44,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 05:13:44,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:13:44,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:44,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:13:44,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:44,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 206 [2022-01-18 05:13:45,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:13:45,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:45,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:13:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:45,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:45,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-01-18 05:13:45,860 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:45,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 212 [2022-01-18 05:13:45,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-01-18 05:13:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:46,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589070039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:46,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:46,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:13:46,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143145127] [2022-01-18 05:13:46,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:46,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:13:46,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:13:46,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:13:46,045 INFO L87 Difference]: Start difference. First operand 2258 states and 7205 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:48,055 INFO L93 Difference]: Finished difference Result 3005 states and 9456 transitions. [2022-01-18 05:13:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:13:48,055 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:48,060 INFO L225 Difference]: With dead ends: 3005 [2022-01-18 05:13:48,060 INFO L226 Difference]: Without dead ends: 2861 [2022-01-18 05:13:48,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=370, Invalid=3170, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:13:48,060 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 204 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 878 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:48,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 998 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1668 Invalid, 0 Unknown, 878 Unchecked, 0.6s Time] [2022-01-18 05:13:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2022-01-18 05:13:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2289. [2022-01-18 05:13:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2288 states have (on average 3.195804195804196) internal successors, (7312), 2288 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 7312 transitions. [2022-01-18 05:13:48,084 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 7312 transitions. Word has length 23 [2022-01-18 05:13:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 7312 transitions. [2022-01-18 05:13:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 7312 transitions. [2022-01-18 05:13:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:48,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:48,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:48,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-01-18 05:13:48,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 05:13:48,288 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash 503222865, now seen corresponding path program 274 times [2022-01-18 05:13:48,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813422459] [2022-01-18 05:13:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:48,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:48,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813422459] [2022-01-18 05:13:48,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813422459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372402940] [2022-01-18 05:13:48,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:13:48,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:48,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:48,398 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) [2022-01-18 05:13:48,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 05:13:48,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:13:48,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:48,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:48,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-01-18 05:13:49,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:49,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-01-18 05:13:49,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 139 [2022-01-18 05:13:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:49,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:49,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-01-18 05:13:50,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 263 [2022-01-18 05:13:50,039 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:13:50,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 241 [2022-01-18 05:13:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:50,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372402940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:50,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:50,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:13:50,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211119933] [2022-01-18 05:13:50,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:50,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:13:50,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:50,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:13:50,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:13:50,189 INFO L87 Difference]: Start difference. First operand 2289 states and 7312 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:51,585 INFO L93 Difference]: Finished difference Result 2910 states and 9119 transitions. [2022-01-18 05:13:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:13:51,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:51,589 INFO L225 Difference]: With dead ends: 2910 [2022-01-18 05:13:51,589 INFO L226 Difference]: Without dead ends: 2805 [2022-01-18 05:13:51,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=320, Invalid=2230, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:13:51,590 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 163 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:51,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 609 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1598 Invalid, 0 Unknown, 191 Unchecked, 0.6s Time] [2022-01-18 05:13:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-01-18 05:13:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2305. [2022-01-18 05:13:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 3.1966145833333335) internal successors, (7365), 2304 states have internal predecessors, (7365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 7365 transitions. [2022-01-18 05:13:51,616 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 7365 transitions. Word has length 23 [2022-01-18 05:13:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:51,616 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 7365 transitions. [2022-01-18 05:13:51,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 7365 transitions. [2022-01-18 05:13:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:51,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:51,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:51,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-01-18 05:13:51,819 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,SelfDestructingSolverStorable290 [2022-01-18 05:13:51,819 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2032399295, now seen corresponding path program 275 times [2022-01-18 05:13:51,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:51,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502212030] [2022-01-18 05:13:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:51,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:51,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502212030] [2022-01-18 05:13:51,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502212030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259650370] [2022-01-18 05:13:51,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:13:51,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:51,952 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) [2022-01-18 05:13:51,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 05:13:52,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:13:52,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:52,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:52,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:52,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-01-18 05:13:52,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:52,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 239 [2022-01-18 05:13:52,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 199 [2022-01-18 05:13:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:52,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:53,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:13:53,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-01-18 05:13:53,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:53,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 148 [2022-01-18 05:13:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259650370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:53,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:53,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:13:53,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949883509] [2022-01-18 05:13:53,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:53,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:13:53,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:13:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:13:53,599 INFO L87 Difference]: Start difference. First operand 2305 states and 7365 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:13:56,041 INFO L93 Difference]: Finished difference Result 3245 states and 9960 transitions. [2022-01-18 05:13:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:13:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:13:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:13:56,047 INFO L225 Difference]: With dead ends: 3245 [2022-01-18 05:13:56,047 INFO L226 Difference]: Without dead ends: 3111 [2022-01-18 05:13:56,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=482, Invalid=3808, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:13:56,048 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 214 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:13:56,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 843 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1958 Invalid, 0 Unknown, 12 Unchecked, 0.7s Time] [2022-01-18 05:13:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-01-18 05:13:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2322. [2022-01-18 05:13:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 3.203791469194313) internal successors, (7436), 2321 states have internal predecessors, (7436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 7436 transitions. [2022-01-18 05:13:56,077 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 7436 transitions. Word has length 23 [2022-01-18 05:13:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:13:56,077 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 7436 transitions. [2022-01-18 05:13:56,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:13:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 7436 transitions. [2022-01-18 05:13:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:13:56,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:13:56,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:13:56,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-18 05:13:56,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:56,280 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:13:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:13:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 298583285, now seen corresponding path program 276 times [2022-01-18 05:13:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:13:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361878612] [2022-01-18 05:13:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:13:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:13:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:13:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:56,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:13:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361878612] [2022-01-18 05:13:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361878612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:13:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682559443] [2022-01-18 05:13:56,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:13:56,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:13:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:13:56,409 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) [2022-01-18 05:13:56,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 05:13:56,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:13:56,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:13:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:13:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:13:56,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 230 [2022-01-18 05:13:57,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-01-18 05:13:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:13:57,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-01-18 05:13:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:13:57,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-01-18 05:13:58,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:13:58,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 289 [2022-01-18 05:13:58,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2022-01-18 05:13:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:13:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682559443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:13:58,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:13:58,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:13:58,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286658121] [2022-01-18 05:13:58,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:13:58,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:13:58,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:13:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:13:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:13:58,381 INFO L87 Difference]: Start difference. First operand 2322 states and 7436 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:00,617 INFO L93 Difference]: Finished difference Result 3180 states and 9793 transitions. [2022-01-18 05:14:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:14:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:00,622 INFO L225 Difference]: With dead ends: 3180 [2022-01-18 05:14:00,622 INFO L226 Difference]: Without dead ends: 3026 [2022-01-18 05:14:00,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=496, Invalid=3794, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:14:00,623 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 211 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:00,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 652 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1629 Invalid, 0 Unknown, 221 Unchecked, 0.6s Time] [2022-01-18 05:14:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2022-01-18 05:14:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2339. [2022-01-18 05:14:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.204875962360992) internal successors, (7493), 2338 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7493 transitions. [2022-01-18 05:14:00,650 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7493 transitions. Word has length 23 [2022-01-18 05:14:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:00,650 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 7493 transitions. [2022-01-18 05:14:00,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7493 transitions. [2022-01-18 05:14:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:00,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:00,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:00,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 05:14:00,853 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,SelfDestructingSolverStorable292 [2022-01-18 05:14:00,853 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash 555897297, now seen corresponding path program 277 times [2022-01-18 05:14:00,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:00,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068700629] [2022-01-18 05:14:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:00,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:01,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068700629] [2022-01-18 05:14:01,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068700629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694904064] [2022-01-18 05:14:01,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:14:01,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:01,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:01,004 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) [2022-01-18 05:14:01,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 05:14:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:01,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 240 [2022-01-18 05:14:01,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:01,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 190 [2022-01-18 05:14:01,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-01-18 05:14:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:02,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:02,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:14:02,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:02,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 344 treesize of output 306 [2022-01-18 05:14:02,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 236 [2022-01-18 05:14:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:03,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694904064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:03,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:03,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 05:14:03,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786023557] [2022-01-18 05:14:03,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:03,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:14:03,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:03,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:14:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:14:03,016 INFO L87 Difference]: Start difference. First operand 2339 states and 7493 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:03,603 INFO L93 Difference]: Finished difference Result 2837 states and 8894 transitions. [2022-01-18 05:14:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:14:03,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:03,607 INFO L225 Difference]: With dead ends: 2837 [2022-01-18 05:14:03,607 INFO L226 Difference]: Without dead ends: 2804 [2022-01-18 05:14:03,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:14:03,607 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:03,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 372 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1019 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2022-01-18 05:14:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-01-18 05:14:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2337. [2022-01-18 05:14:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 3.2059075342465753) internal successors, (7489), 2336 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 7489 transitions. [2022-01-18 05:14:03,633 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 7489 transitions. Word has length 23 [2022-01-18 05:14:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:03,633 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 7489 transitions. [2022-01-18 05:14:03,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 7489 transitions. [2022-01-18 05:14:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:03,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:03,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:03,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 05:14:03,836 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,SelfDestructingSolverStorable293 [2022-01-18 05:14:03,837 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1845906179, now seen corresponding path program 278 times [2022-01-18 05:14:03,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233532819] [2022-01-18 05:14:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:03,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:03,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:03,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233532819] [2022-01-18 05:14:03,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233532819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:03,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131553136] [2022-01-18 05:14:03,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:14:03,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:03,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:03,938 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) [2022-01-18 05:14:03,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 05:14:04,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:14:04,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:04,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:04,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:14:04,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:04,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 244 [2022-01-18 05:14:04,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 192 [2022-01-18 05:14:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:05,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:05,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-01-18 05:14:05,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:05,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 177 [2022-01-18 05:14:05,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:14:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:05,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131553136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:05,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:05,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:14:05,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929823944] [2022-01-18 05:14:05,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:05,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:14:05,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:14:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:14:05,909 INFO L87 Difference]: Start difference. First operand 2337 states and 7489 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-01-18 05:14:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:06,435 INFO L93 Difference]: Finished difference Result 3111 states and 9588 transitions. [2022-01-18 05:14:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:14:06,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:06,440 INFO L225 Difference]: With dead ends: 3111 [2022-01-18 05:14:06,440 INFO L226 Difference]: Without dead ends: 3002 [2022-01-18 05:14:06,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:14:06,440 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 250 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:06,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 343 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 917 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-01-18 05:14:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2022-01-18 05:14:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2387. [2022-01-18 05:14:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.2233864207879295) internal successors, (7691), 2386 states have internal predecessors, (7691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 7691 transitions. [2022-01-18 05:14:06,469 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 7691 transitions. Word has length 23 [2022-01-18 05:14:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:06,469 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 7691 transitions. [2022-01-18 05:14:06,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-01-18 05:14:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 7691 transitions. [2022-01-18 05:14:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:06,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:06,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:06,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 05:14:06,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:06,673 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1431726311, now seen corresponding path program 279 times [2022-01-18 05:14:06,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:06,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624348687] [2022-01-18 05:14:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:06,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:06,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:06,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624348687] [2022-01-18 05:14:06,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624348687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:06,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177240661] [2022-01-18 05:14:06,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:14:06,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:06,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:06,832 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) [2022-01-18 05:14:06,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 05:14:07,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:14:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:07,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:07,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-01-18 05:14:07,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 05:14:07,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:07,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-01-18 05:14:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:07,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:08,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-01-18 05:14:08,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:08,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 268 [2022-01-18 05:14:08,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 194 [2022-01-18 05:14:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:08,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177240661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:08,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:08,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 05:14:08,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351350448] [2022-01-18 05:14:08,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:08,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:14:08,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:14:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:14:08,664 INFO L87 Difference]: Start difference. First operand 2387 states and 7691 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:09,633 INFO L93 Difference]: Finished difference Result 2922 states and 9265 transitions. [2022-01-18 05:14:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:14:09,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:09,639 INFO L225 Difference]: With dead ends: 2922 [2022-01-18 05:14:09,639 INFO L226 Difference]: Without dead ends: 2881 [2022-01-18 05:14:09,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:14:09,640 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 189 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:09,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 277 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 787 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-01-18 05:14:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2022-01-18 05:14:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2400. [2022-01-18 05:14:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 3.2346811171321384) internal successors, (7760), 2399 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7760 transitions. [2022-01-18 05:14:09,676 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7760 transitions. Word has length 23 [2022-01-18 05:14:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:09,676 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7760 transitions. [2022-01-18 05:14:09,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7760 transitions. [2022-01-18 05:14:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:09,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:09,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:09,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-01-18 05:14:09,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:09,879 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1405358201, now seen corresponding path program 280 times [2022-01-18 05:14:09,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:09,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736386597] [2022-01-18 05:14:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:09,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:10,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:10,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736386597] [2022-01-18 05:14:10,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736386597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:10,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982053528] [2022-01-18 05:14:10,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:14:10,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:10,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:10,014 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) [2022-01-18 05:14:10,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 05:14:10,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:14:10,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:10,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-01-18 05:14:10,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:14:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:10,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:14:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:10,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:11,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-01-18 05:14:11,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-01-18 05:14:11,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:11,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 200 [2022-01-18 05:14:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:11,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982053528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:11,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:11,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 05:14:11,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153946070] [2022-01-18 05:14:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:11,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:14:11,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:14:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:14:11,819 INFO L87 Difference]: Start difference. First operand 2400 states and 7760 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:14,650 INFO L93 Difference]: Finished difference Result 3868 states and 11796 transitions. [2022-01-18 05:14:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 05:14:14,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:14,656 INFO L225 Difference]: With dead ends: 3868 [2022-01-18 05:14:14,656 INFO L226 Difference]: Without dead ends: 3645 [2022-01-18 05:14:14,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=606, Invalid=6200, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 05:14:14,657 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 319 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 3088 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:14,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1277 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3088 Invalid, 0 Unknown, 308 Unchecked, 1.1s Time] [2022-01-18 05:14:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2022-01-18 05:14:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 2434. [2022-01-18 05:14:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 3.2404438964241677) internal successors, (7884), 2433 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 7884 transitions. [2022-01-18 05:14:14,689 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 7884 transitions. Word has length 23 [2022-01-18 05:14:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:14,689 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 7884 transitions. [2022-01-18 05:14:14,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 7884 transitions. [2022-01-18 05:14:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:14,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:14,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:14,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-18 05:14:14,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:14,892 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1130084337, now seen corresponding path program 281 times [2022-01-18 05:14:14,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:14,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272278856] [2022-01-18 05:14:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:14,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:15,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:15,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272278856] [2022-01-18 05:14:15,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272278856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:15,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115078656] [2022-01-18 05:14:15,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:14:15,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:15,012 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) [2022-01-18 05:14:15,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 05:14:15,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:14:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:15,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-01-18 05:14:15,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 195 [2022-01-18 05:14:15,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:15,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 177 [2022-01-18 05:14:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:16,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:16,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:14:16,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:16,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 302 treesize of output 264 [2022-01-18 05:14:16,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 204 [2022-01-18 05:14:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:16,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115078656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:16,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:16,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-01-18 05:14:16,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902859529] [2022-01-18 05:14:16,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:16,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:14:16,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:16,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:14:16,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:14:16,909 INFO L87 Difference]: Start difference. First operand 2434 states and 7884 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:17,849 INFO L93 Difference]: Finished difference Result 3303 states and 10481 transitions. [2022-01-18 05:14:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:14:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:17,854 INFO L225 Difference]: With dead ends: 3303 [2022-01-18 05:14:17,854 INFO L226 Difference]: Without dead ends: 3166 [2022-01-18 05:14:17,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:14:17,855 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:17,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 447 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1474 Invalid, 0 Unknown, 188 Unchecked, 0.5s Time] [2022-01-18 05:14:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-01-18 05:14:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2554. [2022-01-18 05:14:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 3.2867215041128084) internal successors, (8391), 2553 states have internal predecessors, (8391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 8391 transitions. [2022-01-18 05:14:17,886 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 8391 transitions. Word has length 23 [2022-01-18 05:14:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:17,886 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 8391 transitions. [2022-01-18 05:14:17,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 8391 transitions. [2022-01-18 05:14:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:17,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:17,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:17,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 05:14:18,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2022-01-18 05:14:18,090 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash -542405693, now seen corresponding path program 282 times [2022-01-18 05:14:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:18,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213612503] [2022-01-18 05:14:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:18,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:18,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:18,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213612503] [2022-01-18 05:14:18,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213612503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:18,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492446014] [2022-01-18 05:14:18,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:14:18,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:18,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:18,225 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) [2022-01-18 05:14:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 05:14:18,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:14:18,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:18,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:14:19,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:19,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 283 [2022-01-18 05:14:19,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 229 [2022-01-18 05:14:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:19,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:19,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-01-18 05:14:20,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-01-18 05:14:20,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:20,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 245 [2022-01-18 05:14:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:20,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492446014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:20,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:20,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 05:14:20,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446764217] [2022-01-18 05:14:20,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:20,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:14:20,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:14:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:14:20,388 INFO L87 Difference]: Start difference. First operand 2554 states and 8391 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:22,741 INFO L93 Difference]: Finished difference Result 3702 states and 11512 transitions. [2022-01-18 05:14:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 05:14:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:22,748 INFO L225 Difference]: With dead ends: 3702 [2022-01-18 05:14:22,748 INFO L226 Difference]: Without dead ends: 3551 [2022-01-18 05:14:22,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=629, Invalid=5377, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 05:14:22,749 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 403 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:22,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 913 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1901 Invalid, 0 Unknown, 370 Unchecked, 0.7s Time] [2022-01-18 05:14:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2022-01-18 05:14:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2585. [2022-01-18 05:14:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 3.293730650154799) internal successors, (8511), 2584 states have internal predecessors, (8511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 8511 transitions. [2022-01-18 05:14:22,803 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 8511 transitions. Word has length 23 [2022-01-18 05:14:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:22,803 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 8511 transitions. [2022-01-18 05:14:22,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 8511 transitions. [2022-01-18 05:14:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:22,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:22,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:22,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-01-18 05:14:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-01-18 05:14:23,007 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1043326779, now seen corresponding path program 283 times [2022-01-18 05:14:23,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871965693] [2022-01-18 05:14:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:23,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:23,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:23,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871965693] [2022-01-18 05:14:23,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871965693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:23,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951182435] [2022-01-18 05:14:23,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:14:23,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:23,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:23,176 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) [2022-01-18 05:14:23,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 05:14:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:23,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:14:23,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:14:23,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:23,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:14:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:24,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:24,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:14:24,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-01-18 05:14:24,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:24,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 207 [2022-01-18 05:14:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:24,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951182435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:24,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:24,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 05:14:24,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493565416] [2022-01-18 05:14:24,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:24,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:14:24,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:14:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:14:24,971 INFO L87 Difference]: Start difference. First operand 2585 states and 8511 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:28,355 INFO L93 Difference]: Finished difference Result 4069 states and 12590 transitions. [2022-01-18 05:14:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 05:14:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:28,361 INFO L225 Difference]: With dead ends: 4069 [2022-01-18 05:14:28,361 INFO L226 Difference]: Without dead ends: 3872 [2022-01-18 05:14:28,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=713, Invalid=6943, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 05:14:28,362 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 287 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:28,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 984 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2440 Invalid, 0 Unknown, 578 Unchecked, 0.9s Time] [2022-01-18 05:14:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2022-01-18 05:14:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2631. [2022-01-18 05:14:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 3.311787072243346) internal successors, (8710), 2630 states have internal predecessors, (8710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 8710 transitions. [2022-01-18 05:14:28,399 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 8710 transitions. Word has length 23 [2022-01-18 05:14:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:28,399 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 8710 transitions. [2022-01-18 05:14:28,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 8710 transitions. [2022-01-18 05:14:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:28,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:28,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:28,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-18 05:14:28,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-01-18 05:14:28,602 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash -930243113, now seen corresponding path program 284 times [2022-01-18 05:14:28,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:28,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604960977] [2022-01-18 05:14:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:28,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:28,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604960977] [2022-01-18 05:14:28,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604960977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361936091] [2022-01-18 05:14:28,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:14:28,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:28,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:28,729 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) [2022-01-18 05:14:28,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 05:14:29,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:14:29,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:29,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:14:29,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:29,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-01-18 05:14:29,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:29,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 258 [2022-01-18 05:14:29,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-01-18 05:14:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:30,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:30,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-01-18 05:14:30,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:30,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 224 [2022-01-18 05:14:30,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 185 [2022-01-18 05:14:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:31,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361936091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:31,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:31,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 05:14:31,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591853993] [2022-01-18 05:14:31,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:14:31,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:14:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:14:31,242 INFO L87 Difference]: Start difference. First operand 2631 states and 8710 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:32,738 INFO L93 Difference]: Finished difference Result 3969 states and 12645 transitions. [2022-01-18 05:14:32,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:14:32,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:32,744 INFO L225 Difference]: With dead ends: 3969 [2022-01-18 05:14:32,744 INFO L226 Difference]: Without dead ends: 3731 [2022-01-18 05:14:32,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:14:32,745 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 290 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:32,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 499 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1510 Invalid, 0 Unknown, 106 Unchecked, 0.6s Time] [2022-01-18 05:14:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2022-01-18 05:14:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 2695. [2022-01-18 05:14:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.351893095768374) internal successors, (9030), 2694 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9030 transitions. [2022-01-18 05:14:32,780 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9030 transitions. Word has length 23 [2022-01-18 05:14:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:32,781 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9030 transitions. [2022-01-18 05:14:32,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9030 transitions. [2022-01-18 05:14:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:32,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:32,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:32,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-01-18 05:14:32,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-01-18 05:14:32,984 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash 123785447, now seen corresponding path program 285 times [2022-01-18 05:14:32,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:32,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284562623] [2022-01-18 05:14:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:32,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:33,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:33,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284562623] [2022-01-18 05:14:33,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284562623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:33,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969236754] [2022-01-18 05:14:33,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:14:33,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:33,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:33,130 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) [2022-01-18 05:14:33,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 05:14:33,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:14:33,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:33,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-01-18 05:14:34,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:34,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 232 [2022-01-18 05:14:34,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 174 [2022-01-18 05:14:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:14:34,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:34,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-01-18 05:14:34,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:34,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 152 [2022-01-18 05:14:34,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 127 [2022-01-18 05:14:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:14:35,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969236754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:35,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:35,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 05:14:35,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543289553] [2022-01-18 05:14:35,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:35,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:14:35,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:14:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:14:35,030 INFO L87 Difference]: Start difference. First operand 2695 states and 9030 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:37,154 INFO L93 Difference]: Finished difference Result 3679 states and 11653 transitions. [2022-01-18 05:14:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:14:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:37,160 INFO L225 Difference]: With dead ends: 3679 [2022-01-18 05:14:37,160 INFO L226 Difference]: Without dead ends: 3487 [2022-01-18 05:14:37,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=3966, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:14:37,161 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 273 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:37,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 785 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2215 Invalid, 0 Unknown, 449 Unchecked, 0.8s Time] [2022-01-18 05:14:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-01-18 05:14:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 2659. [2022-01-18 05:14:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 3.3209179834462) internal successors, (8827), 2658 states have internal predecessors, (8827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 8827 transitions. [2022-01-18 05:14:37,198 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 8827 transitions. Word has length 23 [2022-01-18 05:14:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:37,198 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 8827 transitions. [2022-01-18 05:14:37,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 8827 transitions. [2022-01-18 05:14:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:37,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:37,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:37,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-01-18 05:14:37,401 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,SelfDestructingSolverStorable301 [2022-01-18 05:14:37,401 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:37,402 INFO L85 PathProgramCache]: Analyzing trace with hash -265273501, now seen corresponding path program 286 times [2022-01-18 05:14:37,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:37,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092175433] [2022-01-18 05:14:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:37,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:37,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:37,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092175433] [2022-01-18 05:14:37,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092175433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:37,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031424053] [2022-01-18 05:14:37,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:14:37,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:37,581 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) [2022-01-18 05:14:37,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 05:14:37,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:14:37,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:38,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 228 [2022-01-18 05:14:38,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:14:38,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:38,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 05:14:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:38,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:38,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-01-18 05:14:39,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 272 [2022-01-18 05:14:39,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:39,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 270 [2022-01-18 05:14:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:39,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031424053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:39,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:39,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-01-18 05:14:39,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954660949] [2022-01-18 05:14:39,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:39,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:14:39,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:39,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:14:39,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:14:39,448 INFO L87 Difference]: Start difference. First operand 2659 states and 8827 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:40,445 INFO L93 Difference]: Finished difference Result 3139 states and 10189 transitions. [2022-01-18 05:14:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:14:40,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:40,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:40,451 INFO L225 Difference]: With dead ends: 3139 [2022-01-18 05:14:40,451 INFO L226 Difference]: Without dead ends: 3102 [2022-01-18 05:14:40,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:14:40,451 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:40,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 411 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1046 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-01-18 05:14:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-01-18 05:14:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2657. [2022-01-18 05:14:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 3.3207831325301207) internal successors, (8820), 2656 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 8820 transitions. [2022-01-18 05:14:40,486 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 8820 transitions. Word has length 23 [2022-01-18 05:14:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:40,486 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 8820 transitions. [2022-01-18 05:14:40,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:40,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 8820 transitions. [2022-01-18 05:14:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:40,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:40,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:40,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 05:14:40,690 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,SelfDestructingSolverStorable302 [2022-01-18 05:14:40,690 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1672486125, now seen corresponding path program 287 times [2022-01-18 05:14:40,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284219202] [2022-01-18 05:14:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:40,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:14:40,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284219202] [2022-01-18 05:14:40,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284219202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308718518] [2022-01-18 05:14:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:14:40,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:40,907 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) [2022-01-18 05:14:40,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 05:14:41,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:14:41,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:41,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 247 [2022-01-18 05:14:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:42,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-01-18 05:14:42,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-01-18 05:14:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:42,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:42,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-01-18 05:14:42,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 249 [2022-01-18 05:14:42,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:42,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 224 [2022-01-18 05:14:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:43,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308718518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:43,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:43,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-01-18 05:14:43,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195233449] [2022-01-18 05:14:43,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:43,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:14:43,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:14:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:14:43,040 INFO L87 Difference]: Start difference. First operand 2657 states and 8820 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:43,847 INFO L93 Difference]: Finished difference Result 3128 states and 10150 transitions. [2022-01-18 05:14:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:14:43,848 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:43,853 INFO L225 Difference]: With dead ends: 3128 [2022-01-18 05:14:43,853 INFO L226 Difference]: Without dead ends: 3113 [2022-01-18 05:14:43,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:14:43,853 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 129 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:43,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 463 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1226 Invalid, 0 Unknown, 380 Unchecked, 0.4s Time] [2022-01-18 05:14:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2022-01-18 05:14:43,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 2652. [2022-01-18 05:14:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 3.3179932101093925) internal successors, (8796), 2651 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 8796 transitions. [2022-01-18 05:14:43,885 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 8796 transitions. Word has length 23 [2022-01-18 05:14:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:43,886 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 8796 transitions. [2022-01-18 05:14:43,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 8796 transitions. [2022-01-18 05:14:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:43,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:43,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:43,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-18 05:14:44,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:44,089 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1210344077, now seen corresponding path program 288 times [2022-01-18 05:14:44,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:44,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117059047] [2022-01-18 05:14:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:44,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:44,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117059047] [2022-01-18 05:14:44,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117059047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807889452] [2022-01-18 05:14:44,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:14:44,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:44,261 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) [2022-01-18 05:14:44,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 05:14:44,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:14:44,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:44,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:44,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-01-18 05:14:44,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 187 [2022-01-18 05:14:44,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:44,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 171 [2022-01-18 05:14:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:45,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:45,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 235 [2022-01-18 05:14:45,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:45,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 228 [2022-01-18 05:14:45,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 174 [2022-01-18 05:14:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807889452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:46,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:46,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-01-18 05:14:46,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744505667] [2022-01-18 05:14:46,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:46,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:14:46,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:14:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:14:46,122 INFO L87 Difference]: Start difference. First operand 2652 states and 8796 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:46,700 INFO L93 Difference]: Finished difference Result 3066 states and 9973 transitions. [2022-01-18 05:14:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:14:46,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:46,705 INFO L225 Difference]: With dead ends: 3066 [2022-01-18 05:14:46,705 INFO L226 Difference]: Without dead ends: 3029 [2022-01-18 05:14:46,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:14:46,706 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:46,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 316 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 828 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-01-18 05:14:46,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-01-18 05:14:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2657. [2022-01-18 05:14:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 3.320406626506024) internal successors, (8819), 2656 states have internal predecessors, (8819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 8819 transitions. [2022-01-18 05:14:46,736 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 8819 transitions. Word has length 23 [2022-01-18 05:14:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:46,736 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 8819 transitions. [2022-01-18 05:14:46,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 8819 transitions. [2022-01-18 05:14:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:46,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:46,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:46,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 05:14:46,940 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,SelfDestructingSolverStorable304 [2022-01-18 05:14:46,940 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2104614365, now seen corresponding path program 289 times [2022-01-18 05:14:46,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:46,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436801292] [2022-01-18 05:14:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:46,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:14:47,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436801292] [2022-01-18 05:14:47,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436801292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058501611] [2022-01-18 05:14:47,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:14:47,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:47,067 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) [2022-01-18 05:14:47,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 05:14:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:47,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:47,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:14:48,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 230 [2022-01-18 05:14:48,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:48,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 229 [2022-01-18 05:14:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:14:48,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:48,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 259 [2022-01-18 05:14:49,300 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:14:49,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 05:14:49,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:14:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:14:49,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058501611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:49,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:49,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:14:49,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446422048] [2022-01-18 05:14:49,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:49,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:14:49,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:14:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:14:49,469 INFO L87 Difference]: Start difference. First operand 2657 states and 8819 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:52,030 INFO L93 Difference]: Finished difference Result 3591 states and 11823 transitions. [2022-01-18 05:14:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:14:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:52,036 INFO L225 Difference]: With dead ends: 3591 [2022-01-18 05:14:52,036 INFO L226 Difference]: Without dead ends: 3489 [2022-01-18 05:14:52,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=558, Invalid=3998, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 05:14:52,037 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 296 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:52,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 625 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1205 Invalid, 0 Unknown, 796 Unchecked, 0.5s Time] [2022-01-18 05:14:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-01-18 05:14:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 2694. [2022-01-18 05:14:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 3.3338284441143706) internal successors, (8978), 2693 states have internal predecessors, (8978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 8978 transitions. [2022-01-18 05:14:52,095 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 8978 transitions. Word has length 23 [2022-01-18 05:14:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:52,095 INFO L470 AbstractCegarLoop]: Abstraction has 2694 states and 8978 transitions. [2022-01-18 05:14:52,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 8978 transitions. [2022-01-18 05:14:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:52,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:52,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:52,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 05:14:52,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-18 05:14:52,299 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1403156825, now seen corresponding path program 290 times [2022-01-18 05:14:52,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:52,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567060221] [2022-01-18 05:14:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:52,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:14:52,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:52,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567060221] [2022-01-18 05:14:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567060221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:52,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163222848] [2022-01-18 05:14:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:14:52,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:52,437 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) [2022-01-18 05:14:52,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 05:14:52,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:14:52,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:52,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:14:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:52,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 264 [2022-01-18 05:14:53,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:14:53,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:53,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 146 [2022-01-18 05:14:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:14:53,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:54,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:14:54,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:54,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 291 [2022-01-18 05:14:54,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 234 [2022-01-18 05:14:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:14:54,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163222848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:54,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:54,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:14:54,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473238934] [2022-01-18 05:14:54,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:54,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:14:54,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:14:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:14:54,806 INFO L87 Difference]: Start difference. First operand 2694 states and 8978 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:55,755 INFO L93 Difference]: Finished difference Result 3418 states and 11014 transitions. [2022-01-18 05:14:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:14:55,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:55,760 INFO L225 Difference]: With dead ends: 3418 [2022-01-18 05:14:55,760 INFO L226 Difference]: Without dead ends: 3334 [2022-01-18 05:14:55,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:14:55,761 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:55,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 444 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1131 Invalid, 0 Unknown, 211 Unchecked, 0.4s Time] [2022-01-18 05:14:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2022-01-18 05:14:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2696. [2022-01-18 05:14:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 3.3280148423005564) internal successors, (8969), 2695 states have internal predecessors, (8969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 8969 transitions. [2022-01-18 05:14:55,795 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 8969 transitions. Word has length 23 [2022-01-18 05:14:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:55,795 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 8969 transitions. [2022-01-18 05:14:55,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 8969 transitions. [2022-01-18 05:14:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:55,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:55,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:55,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-18 05:14:55,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:55,998 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1655765473, now seen corresponding path program 291 times [2022-01-18 05:14:55,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853762041] [2022-01-18 05:14:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:55,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:14:56,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853762041] [2022-01-18 05:14:56,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853762041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388135683] [2022-01-18 05:14:56,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:14:56,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:56,169 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) [2022-01-18 05:14:56,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 05:14:56,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:14:56,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:56,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 150 [2022-01-18 05:14:56,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 05:14:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:56,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-01-18 05:14:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:14:57,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:14:57,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:14:57,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:14:57,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:14:57,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 169 [2022-01-18 05:14:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:14:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388135683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:14:57,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:14:57,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:14:57,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199377794] [2022-01-18 05:14:57,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:14:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:14:57,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:14:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:14:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:14:57,806 INFO L87 Difference]: Start difference. First operand 2696 states and 8969 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:14:58,518 INFO L93 Difference]: Finished difference Result 3313 states and 10703 transitions. [2022-01-18 05:14:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:14:58,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:14:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:14:58,524 INFO L225 Difference]: With dead ends: 3313 [2022-01-18 05:14:58,524 INFO L226 Difference]: Without dead ends: 3259 [2022-01-18 05:14:58,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:14:58,524 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 205 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:14:58,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 321 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 842 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2022-01-18 05:14:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2022-01-18 05:14:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 2690. [2022-01-18 05:14:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 3.3250278914094458) internal successors, (8941), 2689 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 8941 transitions. [2022-01-18 05:14:58,561 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 8941 transitions. Word has length 23 [2022-01-18 05:14:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:14:58,561 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 8941 transitions. [2022-01-18 05:14:58,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:14:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 8941 transitions. [2022-01-18 05:14:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:14:58,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:14:58,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:14:58,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-01-18 05:14:58,765 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,SelfDestructingSolverStorable307 [2022-01-18 05:14:58,765 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:14:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:14:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1976313859, now seen corresponding path program 292 times [2022-01-18 05:14:58,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:14:58,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932381369] [2022-01-18 05:14:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:14:58,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:14:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:14:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:14:58,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:14:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932381369] [2022-01-18 05:14:58,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932381369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:14:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172069357] [2022-01-18 05:14:58,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:14:58,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:14:58,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:14:58,896 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) [2022-01-18 05:14:58,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 05:14:59,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:14:59,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:14:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:14:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:14:59,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2022-01-18 05:14:59,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:14:59,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 259 [2022-01-18 05:14:59,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 229 [2022-01-18 05:15:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:00,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:00,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-01-18 05:15:00,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:15:00,639 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:15:00,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 05:15:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:00,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172069357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:00,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:00,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:15:00,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139345954] [2022-01-18 05:15:00,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:00,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:15:00,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:00,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:15:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:15:00,754 INFO L87 Difference]: Start difference. First operand 2690 states and 8941 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:01,808 INFO L93 Difference]: Finished difference Result 3419 states and 11055 transitions. [2022-01-18 05:15:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:15:01,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:01,814 INFO L225 Difference]: With dead ends: 3419 [2022-01-18 05:15:01,814 INFO L226 Difference]: Without dead ends: 3262 [2022-01-18 05:15:01,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:15:01,814 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 78 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:01,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 725 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1287 Invalid, 0 Unknown, 302 Unchecked, 0.4s Time] [2022-01-18 05:15:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2022-01-18 05:15:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2716. [2022-01-18 05:15:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 3.3226519337016573) internal successors, (9021), 2715 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 9021 transitions. [2022-01-18 05:15:01,846 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 9021 transitions. Word has length 23 [2022-01-18 05:15:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:01,847 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 9021 transitions. [2022-01-18 05:15:01,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 9021 transitions. [2022-01-18 05:15:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:01,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:01,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:01,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-01-18 05:15:02,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:02,050 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash -584083717, now seen corresponding path program 293 times [2022-01-18 05:15:02,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:02,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213384470] [2022-01-18 05:15:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:02,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:02,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213384470] [2022-01-18 05:15:02,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213384470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041999248] [2022-01-18 05:15:02,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:15:02,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:02,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:02,151 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) [2022-01-18 05:15:02,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 05:15:02,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:15:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:02,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:15:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:02,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 245 [2022-01-18 05:15:03,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:03,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-01-18 05:15:03,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 139 [2022-01-18 05:15:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:03,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:03,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 203 [2022-01-18 05:15:04,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:04,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 185 [2022-01-18 05:15:04,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:15:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:04,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041999248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:04,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:04,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:15:04,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461338293] [2022-01-18 05:15:04,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:04,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:15:04,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:04,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:15:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:15:04,390 INFO L87 Difference]: Start difference. First operand 2716 states and 9021 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-01-18 05:15:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:05,057 INFO L93 Difference]: Finished difference Result 3478 states and 11113 transitions. [2022-01-18 05:15:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:15:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:05,063 INFO L225 Difference]: With dead ends: 3478 [2022-01-18 05:15:05,063 INFO L226 Difference]: Without dead ends: 3250 [2022-01-18 05:15:05,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:15:05,063 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 124 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:05,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 380 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1017 Invalid, 0 Unknown, 187 Unchecked, 0.4s Time] [2022-01-18 05:15:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2022-01-18 05:15:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2751. [2022-01-18 05:15:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2750 states have (on average 3.3181818181818183) internal successors, (9125), 2750 states have internal predecessors, (9125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 9125 transitions. [2022-01-18 05:15:05,095 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 9125 transitions. Word has length 23 [2022-01-18 05:15:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:05,095 INFO L470 AbstractCegarLoop]: Abstraction has 2751 states and 9125 transitions. [2022-01-18 05:15:05,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2022-01-18 05:15:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 9125 transitions. [2022-01-18 05:15:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:05,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:05,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:05,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-18 05:15:05,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-01-18 05:15:05,299 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash 97747823, now seen corresponding path program 294 times [2022-01-18 05:15:05,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:05,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152305811] [2022-01-18 05:15:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:05,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:05,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:05,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152305811] [2022-01-18 05:15:05,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152305811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658772376] [2022-01-18 05:15:05,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:15:05,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:05,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:05,395 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) [2022-01-18 05:15:05,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 05:15:05,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:15:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:05,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:15:06,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:15:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:06,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-01-18 05:15:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:06,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:06,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 263 [2022-01-18 05:15:07,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 287 [2022-01-18 05:15:07,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:07,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 266 [2022-01-18 05:15:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:07,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658772376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:07,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:07,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:15:07,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194710268] [2022-01-18 05:15:07,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:07,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:15:07,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:15:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:15:07,401 INFO L87 Difference]: Start difference. First operand 2751 states and 9125 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:07,653 INFO L93 Difference]: Finished difference Result 3038 states and 9865 transitions. [2022-01-18 05:15:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:15:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:07,658 INFO L225 Difference]: With dead ends: 3038 [2022-01-18 05:15:07,658 INFO L226 Difference]: Without dead ends: 3012 [2022-01-18 05:15:07,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:15:07,658 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:07,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 273 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 634 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-01-18 05:15:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2022-01-18 05:15:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2745. [2022-01-18 05:15:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 3.32033527696793) internal successors, (9111), 2744 states have internal predecessors, (9111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 9111 transitions. [2022-01-18 05:15:07,691 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 9111 transitions. Word has length 23 [2022-01-18 05:15:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:07,691 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 9111 transitions. [2022-01-18 05:15:07,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 9111 transitions. [2022-01-18 05:15:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:07,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:07,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:07,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-01-18 05:15:07,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-01-18 05:15:07,894 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:07,895 INFO L85 PathProgramCache]: Analyzing trace with hash -345151317, now seen corresponding path program 295 times [2022-01-18 05:15:07,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:07,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764657678] [2022-01-18 05:15:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:07,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:08,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764657678] [2022-01-18 05:15:08,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764657678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603598370] [2022-01-18 05:15:08,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:15:08,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:08,104 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) [2022-01-18 05:15:08,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 05:15:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:08,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:15:09,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:15:09,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:09,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:15:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:09,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:09,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-01-18 05:15:09,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 182 [2022-01-18 05:15:09,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:09,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 181 [2022-01-18 05:15:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:09,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603598370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:09,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:09,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:15:09,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934513852] [2022-01-18 05:15:09,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:09,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:15:09,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:15:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:15:09,872 INFO L87 Difference]: Start difference. First operand 2745 states and 9111 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:11,492 INFO L93 Difference]: Finished difference Result 3548 states and 11162 transitions. [2022-01-18 05:15:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:15:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:11,498 INFO L225 Difference]: With dead ends: 3548 [2022-01-18 05:15:11,498 INFO L226 Difference]: Without dead ends: 3375 [2022-01-18 05:15:11,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=2577, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:15:11,499 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 220 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:11,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 669 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1494 Invalid, 0 Unknown, 517 Unchecked, 0.6s Time] [2022-01-18 05:15:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-01-18 05:15:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2745. [2022-01-18 05:15:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 3.318513119533528) internal successors, (9106), 2744 states have internal predecessors, (9106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 9106 transitions. [2022-01-18 05:15:11,533 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 9106 transitions. Word has length 23 [2022-01-18 05:15:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:11,533 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 9106 transitions. [2022-01-18 05:15:11,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 9106 transitions. [2022-01-18 05:15:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:11,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:11,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:11,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-01-18 05:15:11,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 05:15:11,737 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:11,737 INFO L85 PathProgramCache]: Analyzing trace with hash 354549417, now seen corresponding path program 296 times [2022-01-18 05:15:11,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:11,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769719143] [2022-01-18 05:15:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:11,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:11,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:11,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769719143] [2022-01-18 05:15:11,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769719143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764008936] [2022-01-18 05:15:11,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:15:11,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:11,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:11,857 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) [2022-01-18 05:15:11,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 05:15:12,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:15:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:15:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:12,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 347 treesize of output 291 [2022-01-18 05:15:12,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:15:12,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:12,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:15:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:13,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:13,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 291 [2022-01-18 05:15:13,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:13,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 185 [2022-01-18 05:15:13,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:15:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:14,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764008936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:14,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:14,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 05:15:14,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992066975] [2022-01-18 05:15:14,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:14,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:15:14,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:15:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:15:14,180 INFO L87 Difference]: Start difference. First operand 2745 states and 9106 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 05:15:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:14,660 INFO L93 Difference]: Finished difference Result 3373 states and 10812 transitions. [2022-01-18 05:15:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:15:14,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:14,666 INFO L225 Difference]: With dead ends: 3373 [2022-01-18 05:15:14,666 INFO L226 Difference]: Without dead ends: 3263 [2022-01-18 05:15:14,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:15:14,667 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:14,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 376 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 726 Invalid, 0 Unknown, 227 Unchecked, 0.3s Time] [2022-01-18 05:15:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2022-01-18 05:15:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2767. [2022-01-18 05:15:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 3.319233550253073) internal successors, (9181), 2766 states have internal predecessors, (9181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 9181 transitions. [2022-01-18 05:15:14,701 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 9181 transitions. Word has length 23 [2022-01-18 05:15:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:14,701 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 9181 transitions. [2022-01-18 05:15:14,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-01-18 05:15:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 9181 transitions. [2022-01-18 05:15:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:14,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:14,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:14,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 05:15:14,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 05:15:14,905 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:14,905 INFO L85 PathProgramCache]: Analyzing trace with hash 388470149, now seen corresponding path program 297 times [2022-01-18 05:15:14,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:14,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188267002] [2022-01-18 05:15:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:14,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:15,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188267002] [2022-01-18 05:15:15,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188267002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133087571] [2022-01-18 05:15:15,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:15:15,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:15,019 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) [2022-01-18 05:15:15,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 05:15:15,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:15:15,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:15:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:15,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 206 [2022-01-18 05:15:16,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:16,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-01-18 05:15:16,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-01-18 05:15:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:16,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-01-18 05:15:16,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:15:16,939 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:15:16,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 05:15:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:17,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133087571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:17,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:17,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 05:15:17,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546348571] [2022-01-18 05:15:17,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:17,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:15:17,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:17,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:15:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:15:17,138 INFO L87 Difference]: Start difference. First operand 2767 states and 9181 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:18,684 INFO L93 Difference]: Finished difference Result 3666 states and 11759 transitions. [2022-01-18 05:15:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:15:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:18,691 INFO L225 Difference]: With dead ends: 3666 [2022-01-18 05:15:18,691 INFO L226 Difference]: Without dead ends: 3523 [2022-01-18 05:15:18,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=2993, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:15:18,692 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 175 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:18,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 861 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1562 Invalid, 0 Unknown, 509 Unchecked, 0.6s Time] [2022-01-18 05:15:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2022-01-18 05:15:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2800. [2022-01-18 05:15:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 3.3126116470167917) internal successors, (9272), 2799 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 9272 transitions. [2022-01-18 05:15:18,726 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 9272 transitions. Word has length 23 [2022-01-18 05:15:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:18,726 INFO L470 AbstractCegarLoop]: Abstraction has 2800 states and 9272 transitions. [2022-01-18 05:15:18,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 9272 transitions. [2022-01-18 05:15:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:18,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:18,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:18,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-01-18 05:15:18,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:18,930 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1175665425, now seen corresponding path program 298 times [2022-01-18 05:15:18,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187088219] [2022-01-18 05:15:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:18,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:19,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:19,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187088219] [2022-01-18 05:15:19,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187088219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:19,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53661591] [2022-01-18 05:15:19,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:15:19,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:19,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:19,117 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) [2022-01-18 05:15:19,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 05:15:19,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:15:19,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:19,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-01-18 05:15:19,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 170 [2022-01-18 05:15:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:19,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 179 [2022-01-18 05:15:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:20,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 373 treesize of output 337 [2022-01-18 05:15:21,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-01-18 05:15:21,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:21,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 214 [2022-01-18 05:15:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:21,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53661591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:21,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:21,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:15:21,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671432431] [2022-01-18 05:15:21,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:21,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:15:21,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:21,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:15:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:15:21,369 INFO L87 Difference]: Start difference. First operand 2800 states and 9272 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:22,594 INFO L93 Difference]: Finished difference Result 3851 states and 12568 transitions. [2022-01-18 05:15:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:15:22,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:22,601 INFO L225 Difference]: With dead ends: 3851 [2022-01-18 05:15:22,601 INFO L226 Difference]: Without dead ends: 3670 [2022-01-18 05:15:22,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:15:22,602 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 377 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:22,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 368 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 832 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-01-18 05:15:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-01-18 05:15:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2899. [2022-01-18 05:15:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 3.3409247757073843) internal successors, (9682), 2898 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 9682 transitions. [2022-01-18 05:15:22,641 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 9682 transitions. Word has length 23 [2022-01-18 05:15:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:22,642 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 9682 transitions. [2022-01-18 05:15:22,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 9682 transitions. [2022-01-18 05:15:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:22,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:22,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:22,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 05:15:22,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:22,845 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2043716023, now seen corresponding path program 299 times [2022-01-18 05:15:22,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:22,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590554564] [2022-01-18 05:15:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:22,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:23,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:23,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590554564] [2022-01-18 05:15:23,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590554564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:23,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465930562] [2022-01-18 05:15:23,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:15:23,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:23,011 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) [2022-01-18 05:15:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 05:15:23,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:15:23,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:23,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:23,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-01-18 05:15:23,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 183 [2022-01-18 05:15:23,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:23,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 165 [2022-01-18 05:15:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:24,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:24,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:15:24,675 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:15:24,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2022-01-18 05:15:24,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 153 [2022-01-18 05:15:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:24,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465930562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:24,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:24,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-01-18 05:15:24,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080150108] [2022-01-18 05:15:24,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:24,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:15:24,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:24,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:15:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:15:24,817 INFO L87 Difference]: Start difference. First operand 2899 states and 9682 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-01-18 05:15:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:26,112 INFO L93 Difference]: Finished difference Result 3501 states and 11640 transitions. [2022-01-18 05:15:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:15:26,112 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:26,119 INFO L225 Difference]: With dead ends: 3501 [2022-01-18 05:15:26,119 INFO L226 Difference]: Without dead ends: 3413 [2022-01-18 05:15:26,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:15:26,119 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 100 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:26,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 584 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1262 Invalid, 0 Unknown, 184 Unchecked, 0.5s Time] [2022-01-18 05:15:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2022-01-18 05:15:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 2914. [2022-01-18 05:15:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2913 states have (on average 3.348094747682801) internal successors, (9753), 2913 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 9753 transitions. [2022-01-18 05:15:26,160 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 9753 transitions. Word has length 23 [2022-01-18 05:15:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:26,161 INFO L470 AbstractCegarLoop]: Abstraction has 2914 states and 9753 transitions. [2022-01-18 05:15:26,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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) [2022-01-18 05:15:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 9753 transitions. [2022-01-18 05:15:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:26,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:26,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:26,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-18 05:15:26,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:26,365 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 106138325, now seen corresponding path program 300 times [2022-01-18 05:15:26,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:26,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304920035] [2022-01-18 05:15:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:26,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:26,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304920035] [2022-01-18 05:15:26,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304920035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080150548] [2022-01-18 05:15:26,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:15:26,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:26,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:26,592 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) [2022-01-18 05:15:26,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 05:15:26,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:15:26,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:26,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:26,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-01-18 05:15:27,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:27,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 260 [2022-01-18 05:15:27,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-01-18 05:15:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:15:27,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:27,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:15:28,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:15:28,303 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:15:28,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 05:15:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:15:28,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080150548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:28,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:28,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-01-18 05:15:28,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908978312] [2022-01-18 05:15:28,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:28,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:15:28,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:15:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:15:28,392 INFO L87 Difference]: Start difference. First operand 2914 states and 9753 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:30,969 INFO L93 Difference]: Finished difference Result 3685 states and 12255 transitions. [2022-01-18 05:15:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 05:15:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:30,975 INFO L225 Difference]: With dead ends: 3685 [2022-01-18 05:15:30,975 INFO L226 Difference]: Without dead ends: 3619 [2022-01-18 05:15:30,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=496, Invalid=4474, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:15:30,976 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 121 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:30,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 866 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1948 Invalid, 0 Unknown, 365 Unchecked, 0.7s Time] [2022-01-18 05:15:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2022-01-18 05:15:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 2916. [2022-01-18 05:15:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 3.349228130360206) internal successors, (9763), 2915 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 9763 transitions. [2022-01-18 05:15:31,011 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 9763 transitions. Word has length 23 [2022-01-18 05:15:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:31,011 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 9763 transitions. [2022-01-18 05:15:31,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 9763 transitions. [2022-01-18 05:15:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:31,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:31,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:31,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-18 05:15:31,216 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,SelfDestructingSolverStorable316 [2022-01-18 05:15:31,216 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash 264722335, now seen corresponding path program 301 times [2022-01-18 05:15:31,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304537989] [2022-01-18 05:15:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:31,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:15:31,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304537989] [2022-01-18 05:15:31,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304537989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003080312] [2022-01-18 05:15:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:15:31,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:31,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:31,372 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) [2022-01-18 05:15:31,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 05:15:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:31,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:15:31,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:31,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 05:15:32,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:15:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:32,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-01-18 05:15:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:15:32,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:32,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-01-18 05:15:33,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:15:33,261 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:15:33,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-01-18 05:15:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:15:33,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003080312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:33,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:33,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 05:15:33,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302827482] [2022-01-18 05:15:33,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:33,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 05:15:33,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 05:15:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:15:33,463 INFO L87 Difference]: Start difference. First operand 2916 states and 9763 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:34,144 INFO L93 Difference]: Finished difference Result 3585 states and 11853 transitions. [2022-01-18 05:15:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:15:34,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:34,151 INFO L225 Difference]: With dead ends: 3585 [2022-01-18 05:15:34,151 INFO L226 Difference]: Without dead ends: 3537 [2022-01-18 05:15:34,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:15:34,151 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:34,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 489 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 899 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2022-01-18 05:15:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2022-01-18 05:15:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2916. [2022-01-18 05:15:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 3.349228130360206) internal successors, (9763), 2915 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 9763 transitions. [2022-01-18 05:15:34,188 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 9763 transitions. Word has length 23 [2022-01-18 05:15:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:34,188 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 9763 transitions. [2022-01-18 05:15:34,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 9763 transitions. [2022-01-18 05:15:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:34,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:34,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:34,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-01-18 05:15:34,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:34,392 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash -954639765, now seen corresponding path program 302 times [2022-01-18 05:15:34,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:34,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889151921] [2022-01-18 05:15:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:34,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:34,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889151921] [2022-01-18 05:15:34,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889151921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926163987] [2022-01-18 05:15:34,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:15:34,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:34,551 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) [2022-01-18 05:15:34,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 05:15:34,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:15:34,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:34,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:34,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:34,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:15:35,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-01-18 05:15:35,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:35,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 187 [2022-01-18 05:15:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:35,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:36,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 263 [2022-01-18 05:15:36,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:36,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 179 [2022-01-18 05:15:36,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:15:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:36,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926163987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:36,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:36,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 05:15:36,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349926405] [2022-01-18 05:15:36,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:36,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:15:36,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:15:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:15:36,955 INFO L87 Difference]: Start difference. First operand 2916 states and 9763 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:37,589 INFO L93 Difference]: Finished difference Result 3840 states and 12617 transitions. [2022-01-18 05:15:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:15:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:37,596 INFO L225 Difference]: With dead ends: 3840 [2022-01-18 05:15:37,596 INFO L226 Difference]: Without dead ends: 3754 [2022-01-18 05:15:37,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:15:37,596 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 193 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:37,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 318 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 701 Invalid, 0 Unknown, 99 Unchecked, 0.3s Time] [2022-01-18 05:15:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-01-18 05:15:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2926. [2022-01-18 05:15:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.353162393162393) internal successors, (9808), 2925 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 9808 transitions. [2022-01-18 05:15:37,637 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 9808 transitions. Word has length 23 [2022-01-18 05:15:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:37,637 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 9808 transitions. [2022-01-18 05:15:37,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 9808 transitions. [2022-01-18 05:15:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:37,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:37,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:37,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 05:15:37,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:37,841 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:37,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1268495607, now seen corresponding path program 303 times [2022-01-18 05:15:37,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:37,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876225252] [2022-01-18 05:15:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:37,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:37,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876225252] [2022-01-18 05:15:37,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876225252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984643670] [2022-01-18 05:15:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:15:37,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:37,983 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) [2022-01-18 05:15:37,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 05:15:38,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:15:38,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:38,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:15:38,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:15:38,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:38,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-01-18 05:15:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:39,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:39,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 278 [2022-01-18 05:15:39,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-01-18 05:15:39,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:39,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 214 [2022-01-18 05:15:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:39,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984643670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:39,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:39,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 05:15:39,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247907935] [2022-01-18 05:15:39,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:39,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:15:39,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:39,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:15:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:15:39,992 INFO L87 Difference]: Start difference. First operand 2926 states and 9808 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-01-18 05:15:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:43,003 INFO L93 Difference]: Finished difference Result 4301 states and 13529 transitions. [2022-01-18 05:15:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:15:43,003 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 23 [2022-01-18 05:15:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:43,010 INFO L225 Difference]: With dead ends: 4301 [2022-01-18 05:15:43,010 INFO L226 Difference]: Without dead ends: 3948 [2022-01-18 05:15:43,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=521, Invalid=4591, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 05:15:43,011 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 275 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:43,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 994 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2305 Invalid, 0 Unknown, 614 Unchecked, 0.9s Time] [2022-01-18 05:15:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2022-01-18 05:15:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 1988. [2022-01-18 05:15:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.544539506794162) internal successors, (7043), 1987 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 7043 transitions. [2022-01-18 05:15:43,047 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 7043 transitions. Word has length 23 [2022-01-18 05:15:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:43,047 INFO L470 AbstractCegarLoop]: Abstraction has 1988 states and 7043 transitions. [2022-01-18 05:15:43,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-01-18 05:15:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 7043 transitions. [2022-01-18 05:15:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:43,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:43,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:43,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-01-18 05:15:43,250 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,SelfDestructingSolverStorable319 [2022-01-18 05:15:43,250 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:43,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:43,250 INFO L85 PathProgramCache]: Analyzing trace with hash 798758523, now seen corresponding path program 304 times [2022-01-18 05:15:43,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:43,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012526661] [2022-01-18 05:15:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:43,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:43,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:43,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012526661] [2022-01-18 05:15:43,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012526661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:43,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486920060] [2022-01-18 05:15:43,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:15:43,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:43,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:43,429 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) [2022-01-18 05:15:43,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 05:15:43,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:15:43,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:43,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-01-18 05:15:44,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-01-18 05:15:44,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:44,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2022-01-18 05:15:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:44,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:44,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-01-18 05:15:45,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:45,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 154 [2022-01-18 05:15:45,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 127 [2022-01-18 05:15:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:45,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486920060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:45,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:45,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:15:45,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962164926] [2022-01-18 05:15:45,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:45,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:15:45,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:15:45,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:15:45,375 INFO L87 Difference]: Start difference. First operand 1988 states and 7043 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:46,378 INFO L93 Difference]: Finished difference Result 3304 states and 11105 transitions. [2022-01-18 05:15:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:15:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:46,384 INFO L225 Difference]: With dead ends: 3304 [2022-01-18 05:15:46,384 INFO L226 Difference]: Without dead ends: 3152 [2022-01-18 05:15:46,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:15:46,385 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 354 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:46,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 408 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1030 Invalid, 0 Unknown, 419 Unchecked, 0.4s Time] [2022-01-18 05:15:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-01-18 05:15:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 1984. [2022-01-18 05:15:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.5431164901664145) internal successors, (7026), 1983 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 7026 transitions. [2022-01-18 05:15:46,415 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 7026 transitions. Word has length 23 [2022-01-18 05:15:46,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:46,415 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 7026 transitions. [2022-01-18 05:15:46,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 7026 transitions. [2022-01-18 05:15:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:46,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:46,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:46,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-01-18 05:15:46,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-01-18 05:15:46,618 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1998417725, now seen corresponding path program 305 times [2022-01-18 05:15:46,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:46,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907185478] [2022-01-18 05:15:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:46,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:46,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907185478] [2022-01-18 05:15:46,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907185478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993221049] [2022-01-18 05:15:46,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:15:46,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:46,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:46,785 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) [2022-01-18 05:15:46,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 05:15:47,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:15:47,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:47,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:47,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-01-18 05:15:47,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:47,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 244 [2022-01-18 05:15:47,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 190 [2022-01-18 05:15:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:48,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:48,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 220 [2022-01-18 05:15:48,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 232 [2022-01-18 05:15:48,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:48,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 213 [2022-01-18 05:15:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:48,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993221049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:48,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:48,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 05:15:48,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487106485] [2022-01-18 05:15:48,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:48,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 05:15:48,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 05:15:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:15:48,931 INFO L87 Difference]: Start difference. First operand 1984 states and 7026 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:53,197 INFO L93 Difference]: Finished difference Result 3368 states and 10885 transitions. [2022-01-18 05:15:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 05:15:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:53,203 INFO L225 Difference]: With dead ends: 3368 [2022-01-18 05:15:53,203 INFO L226 Difference]: Without dead ends: 3175 [2022-01-18 05:15:53,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=746, Invalid=7086, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 05:15:53,204 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 393 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 973 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:53,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 968 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2560 Invalid, 0 Unknown, 973 Unchecked, 1.1s Time] [2022-01-18 05:15:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2022-01-18 05:15:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 1948. [2022-01-18 05:15:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.5382639958911146) internal successors, (6889), 1947 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6889 transitions. [2022-01-18 05:15:53,237 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6889 transitions. Word has length 23 [2022-01-18 05:15:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:53,237 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 6889 transitions. [2022-01-18 05:15:53,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6889 transitions. [2022-01-18 05:15:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:53,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:53,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:53,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-01-18 05:15:53,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-18 05:15:53,440 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1257025455, now seen corresponding path program 306 times [2022-01-18 05:15:53,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222666564] [2022-01-18 05:15:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:53,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:15:53,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:53,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222666564] [2022-01-18 05:15:53,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222666564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704153364] [2022-01-18 05:15:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:15:53,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:53,625 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) [2022-01-18 05:15:53,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 05:15:53,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:15:53,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:15:53,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:54,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 224 [2022-01-18 05:15:54,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 05:15:54,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:54,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 134 [2022-01-18 05:15:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:54,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:54,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-01-18 05:15:55,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:15:55,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 177 [2022-01-18 05:15:55,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 05:15:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:55,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704153364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:55,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:55,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:15:55,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982803672] [2022-01-18 05:15:55,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:55,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:15:55,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:55,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:15:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:15:55,416 INFO L87 Difference]: Start difference. First operand 1948 states and 6889 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:56,591 INFO L93 Difference]: Finished difference Result 3220 states and 10762 transitions. [2022-01-18 05:15:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:15:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:56,597 INFO L225 Difference]: With dead ends: 3220 [2022-01-18 05:15:56,597 INFO L226 Difference]: Without dead ends: 2999 [2022-01-18 05:15:56,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:15:56,597 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 283 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:56,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 346 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 926 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-01-18 05:15:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-01-18 05:15:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2030. [2022-01-18 05:15:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 3.5687530803351404) internal successors, (7241), 2029 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 7241 transitions. [2022-01-18 05:15:56,650 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 7241 transitions. Word has length 23 [2022-01-18 05:15:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:15:56,650 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 7241 transitions. [2022-01-18 05:15:56,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 7241 transitions. [2022-01-18 05:15:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:15:56,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:15:56,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:15:56,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-18 05:15:56,853 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,SelfDestructingSolverStorable322 [2022-01-18 05:15:56,854 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:15:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:15:56,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1537446503, now seen corresponding path program 307 times [2022-01-18 05:15:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:15:56,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313134211] [2022-01-18 05:15:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:15:56,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:15:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:15:56,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:15:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313134211] [2022-01-18 05:15:56,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313134211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:15:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511704737] [2022-01-18 05:15:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:15:56,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:15:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:15:56,983 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) [2022-01-18 05:15:56,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 05:15:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:15:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:15:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:15:57,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 223 [2022-01-18 05:15:57,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:15:57,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-01-18 05:15:57,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 139 [2022-01-18 05:15:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:15:58,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:15:58,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-01-18 05:15:58,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-01-18 05:15:58,701 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:15:58,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 184 [2022-01-18 05:15:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:15:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511704737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:15:58,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:15:58,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:15:58,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817111707] [2022-01-18 05:15:58,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:15:58,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:15:58,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:15:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:15:58,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:15:58,872 INFO L87 Difference]: Start difference. First operand 2030 states and 7241 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:15:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:15:59,992 INFO L93 Difference]: Finished difference Result 2890 states and 9880 transitions. [2022-01-18 05:15:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:15:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:15:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:15:59,997 INFO L225 Difference]: With dead ends: 2890 [2022-01-18 05:15:59,997 INFO L226 Difference]: Without dead ends: 2787 [2022-01-18 05:15:59,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:15:59,998 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 136 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:15:59,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 737 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1179 Invalid, 0 Unknown, 626 Unchecked, 0.4s Time] [2022-01-18 05:16:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2022-01-18 05:16:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2074. [2022-01-18 05:16:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 3.5547515677761696) internal successors, (7369), 2073 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 7369 transitions. [2022-01-18 05:16:00,026 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 7369 transitions. Word has length 23 [2022-01-18 05:16:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:16:00,026 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 7369 transitions. [2022-01-18 05:16:00,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 7369 transitions. [2022-01-18 05:16:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:16:00,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:16:00,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:16:00,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-01-18 05:16:00,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 05:16:00,229 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:16:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:16:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash 217407599, now seen corresponding path program 308 times [2022-01-18 05:16:00,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:16:00,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048576250] [2022-01-18 05:16:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:16:00,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:16:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:16:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:16:00,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:16:00,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048576250] [2022-01-18 05:16:00,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048576250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:16:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060949432] [2022-01-18 05:16:00,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:16:00,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:00,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:16:00,352 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) [2022-01-18 05:16:00,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 05:16:00,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:16:00,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:16:00,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 05:16:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:16:00,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:16:01,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 197 [2022-01-18 05:16:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:16:01,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 191 [2022-01-18 05:16:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:16:01,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:16:01,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-01-18 05:16:02,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:16:02,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 192 [2022-01-18 05:16:02,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 157 [2022-01-18 05:16:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:16:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060949432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:16:02,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:16:02,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 05:16:02,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310583046] [2022-01-18 05:16:02,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:16:02,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:16:02,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:16:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:16:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:16:02,654 INFO L87 Difference]: Start difference. First operand 2074 states and 7369 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:16:03,997 INFO L93 Difference]: Finished difference Result 3669 states and 11876 transitions. [2022-01-18 05:16:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:16:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:16:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:16:04,003 INFO L225 Difference]: With dead ends: 3669 [2022-01-18 05:16:04,003 INFO L226 Difference]: Without dead ends: 3543 [2022-01-18 05:16:04,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:16:04,004 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 309 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:16:04,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 474 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:16:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-01-18 05:16:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2063. [2022-01-18 05:16:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.5470417070805045) internal successors, (7314), 2062 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7314 transitions. [2022-01-18 05:16:04,052 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7314 transitions. Word has length 23 [2022-01-18 05:16:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:16:04,052 INFO L470 AbstractCegarLoop]: Abstraction has 2063 states and 7314 transitions. [2022-01-18 05:16:04,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7314 transitions. [2022-01-18 05:16:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:16:04,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:16:04,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:16:04,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-18 05:16:04,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:04,255 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:16:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:16:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1919523695, now seen corresponding path program 309 times [2022-01-18 05:16:04,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:16:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117820957] [2022-01-18 05:16:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:16:04,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:16:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:16:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:04,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:16:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117820957] [2022-01-18 05:16:04,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117820957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:16:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378233745] [2022-01-18 05:16:04,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:16:04,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:04,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:16:04,420 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) [2022-01-18 05:16:04,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 05:16:04,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:16:04,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:16:04,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:16:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:16:04,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 146 [2022-01-18 05:16:05,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-01-18 05:16:05,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:16:05,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 149 [2022-01-18 05:16:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:16:05,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:16:05,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-01-18 05:16:05,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:16:05,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 223 [2022-01-18 05:16:05,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 174 [2022-01-18 05:16:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:16:06,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378233745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:16:06,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:16:06,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 05:16:06,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654439315] [2022-01-18 05:16:06,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:16:06,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:16:06,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:16:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:16:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:16:06,113 INFO L87 Difference]: Start difference. First operand 2063 states and 7314 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) [2022-01-18 05:16:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:16:07,133 INFO L93 Difference]: Finished difference Result 2790 states and 9567 transitions. [2022-01-18 05:16:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:16:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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 23 [2022-01-18 05:16:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:16:07,138 INFO L225 Difference]: With dead ends: 2790 [2022-01-18 05:16:07,138 INFO L226 Difference]: Without dead ends: 2675 [2022-01-18 05:16:07,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:16:07,139 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 177 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:16:07,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 460 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:16:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-01-18 05:16:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2135. [2022-01-18 05:16:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.5463917525773194) internal successors, (7568), 2134 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7568 transitions. [2022-01-18 05:16:07,179 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7568 transitions. Word has length 23 [2022-01-18 05:16:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:16:07,179 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 7568 transitions. [2022-01-18 05:16:07,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) [2022-01-18 05:16:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7568 transitions. [2022-01-18 05:16:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:16:07,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:16:07,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:16:07,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-01-18 05:16:07,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:07,382 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:16:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:16:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash -926267853, now seen corresponding path program 310 times [2022-01-18 05:16:07,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:16:07,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973043956] [2022-01-18 05:16:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:16:07,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:16:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:16:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:07,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:16:07,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973043956] [2022-01-18 05:16:07,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973043956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:16:07,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385051034] [2022-01-18 05:16:07,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:16:07,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:07,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:16:07,603 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) [2022-01-18 05:16:07,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 05:16:07,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:16:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:16:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:16:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:16:08,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-01-18 05:16:08,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:16:08,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 237 [2022-01-18 05:16:08,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 203 [2022-01-18 05:16:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:08,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:16:09,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-01-18 05:16:09,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:16:09,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 344 treesize of output 302 [2022-01-18 05:16:09,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 236 [2022-01-18 05:16:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:09,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385051034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:16:09,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:16:09,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:16:09,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807160370] [2022-01-18 05:16:09,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:16:09,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:16:09,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:16:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:16:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:16:09,704 INFO L87 Difference]: Start difference. First operand 2135 states and 7568 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:16:11,459 INFO L93 Difference]: Finished difference Result 2963 states and 10153 transitions. [2022-01-18 05:16:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:16:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:16:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:16:11,464 INFO L225 Difference]: With dead ends: 2963 [2022-01-18 05:16:11,464 INFO L226 Difference]: Without dead ends: 2779 [2022-01-18 05:16:11,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=339, Invalid=2967, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:16:11,465 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:16:11,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 601 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1750 Invalid, 0 Unknown, 216 Unchecked, 0.7s Time] [2022-01-18 05:16:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2022-01-18 05:16:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2227. [2022-01-18 05:16:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.577268643306379) internal successors, (7963), 2226 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 7963 transitions. [2022-01-18 05:16:11,494 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 7963 transitions. Word has length 23 [2022-01-18 05:16:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:16:11,494 INFO L470 AbstractCegarLoop]: Abstraction has 2227 states and 7963 transitions. [2022-01-18 05:16:11,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 7963 transitions. [2022-01-18 05:16:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:16:11,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:16:11,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:16:11,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-18 05:16:11,697 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,SelfDestructingSolverStorable326 [2022-01-18 05:16:11,697 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:16:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:16:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1431121745, now seen corresponding path program 311 times [2022-01-18 05:16:11,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:16:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369105115] [2022-01-18 05:16:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:16:11,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:16:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:16:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:11,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:16:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369105115] [2022-01-18 05:16:11,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369105115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:16:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290336076] [2022-01-18 05:16:11,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:16:11,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:11,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:16:11,935 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) [2022-01-18 05:16:11,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 05:16:12,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:16:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:16:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:16:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:16:12,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-01-18 05:16:12,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:16:12,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 238 [2022-01-18 05:16:12,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 200 [2022-01-18 05:16:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:13,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:16:13,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 211 [2022-01-18 05:16:13,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-01-18 05:16:13,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:16:13,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 215 [2022-01-18 05:16:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:13,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290336076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:16:13,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:16:13,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-18 05:16:13,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52907981] [2022-01-18 05:16:13,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:16:13,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:16:13,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:16:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:16:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:16:13,890 INFO L87 Difference]: Start difference. First operand 2227 states and 7963 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:16:18,600 INFO L93 Difference]: Finished difference Result 3518 states and 11670 transitions. [2022-01-18 05:16:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 05:16:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:16:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:16:18,606 INFO L225 Difference]: With dead ends: 3518 [2022-01-18 05:16:18,606 INFO L226 Difference]: Without dead ends: 3356 [2022-01-18 05:16:18,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=831, Invalid=8099, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 05:16:18,607 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 249 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:16:18,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1243 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3048 Invalid, 0 Unknown, 244 Unchecked, 1.2s Time] [2022-01-18 05:16:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-01-18 05:16:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2240. [2022-01-18 05:16:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 3.5788298347476553) internal successors, (8013), 2239 states have internal predecessors, (8013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 8013 transitions. [2022-01-18 05:16:18,638 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 8013 transitions. Word has length 23 [2022-01-18 05:16:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:16:18,638 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 8013 transitions. [2022-01-18 05:16:18,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:16:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 8013 transitions. [2022-01-18 05:16:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:16:18,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:16:18,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:16:18,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-01-18 05:16:18,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:18,842 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:16:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:16:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash -302694265, now seen corresponding path program 312 times [2022-01-18 05:16:18,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:16:18,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108593564] [2022-01-18 05:16:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:16:18,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:16:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:16:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:19,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:16:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108593564] [2022-01-18 05:16:19,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108593564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:16:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126891319] [2022-01-18 05:16:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:16:19,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:19,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:16:19,046 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) [2022-01-18 05:16:19,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 05:16:19,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:16:19,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:16:19,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 05:16:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:16:19,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-01-18 05:16:19,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-01-18 05:16:19,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:16:19,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-01-18 05:16:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:16:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:16:20,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 Received shutdown request... [2022-01-18 05:16:20,588 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 [2022-01-18 05:16:20,588 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 05:16:20,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-01-18 05:16:20,625 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 05:16:20,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:16:20,789 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-3-2-3-2-1 context. [2022-01-18 05:16:20,791 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 05:16:20,791 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 05:16:20,791 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 05:16:20,793 INFO L732 BasicCegarLoop]: Path program histogram: [312, 6, 3, 3, 2, 1, 1, 1] [2022-01-18 05:16:20,796 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 05:16:20,796 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 05:16:20,797 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:16:20 BasicIcfg [2022-01-18 05:16:20,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 05:16:20,798 INFO L158 Benchmark]: Toolchain (without parser) took 722568.17ms. Allocated memory was 377.5MB in the beginning and 570.4MB in the end (delta: 192.9MB). Free memory was 337.1MB in the beginning and 343.0MB in the end (delta: -5.8MB). Peak memory consumption was 188.7MB. Max. memory is 16.0GB. [2022-01-18 05:16:20,798 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 377.5MB. Free memory is still 338.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:16:20,798 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.48ms. Allocated memory is still 377.5MB. Free memory was 337.1MB in the beginning and 335.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 05:16:20,798 INFO L158 Benchmark]: Boogie Preprocessor took 34.97ms. Allocated memory is still 377.5MB. Free memory was 335.5MB in the beginning and 334.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 05:16:20,798 INFO L158 Benchmark]: RCFGBuilder took 322.22ms. Allocated memory is still 377.5MB. Free memory was 334.3MB in the beginning and 317.8MB in the end (delta: 16.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-18 05:16:20,798 INFO L158 Benchmark]: TraceAbstraction took 722161.30ms. Allocated memory was 377.5MB in the beginning and 570.4MB in the end (delta: 192.9MB). Free memory was 350.1MB in the beginning and 343.0MB in the end (delta: 7.1MB). Peak memory consumption was 200.0MB. Max. memory is 16.0GB. [2022-01-18 05:16:20,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 377.5MB. Free memory is still 338.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.48ms. Allocated memory is still 377.5MB. Free memory was 337.1MB in the beginning and 335.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.97ms. Allocated memory is still 377.5MB. Free memory was 335.5MB in the beginning and 334.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 322.22ms. Allocated memory is still 377.5MB. Free memory was 334.3MB in the beginning and 317.8MB in the end (delta: 16.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 722161.30ms. Allocated memory was 377.5MB in the beginning and 570.4MB in the end (delta: 192.9MB). Free memory was 350.1MB in the beginning and 343.0MB in the end (delta: 7.1MB). Peak memory consumption was 200.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-3-2-3-2-1 context. - TimeoutResultAtElement [Line: 133]: 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 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-3-2-3-2-1 context. - TimeoutResultAtElement [Line: 136]: 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 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-3-2-3-2-1 context. - TimeoutResultAtElement [Line: 137]: 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 24 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-3-2-3-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 722.1s, OverallIterations: 329, TraceHistogramMax: 3, PathProgramHistogramMax: 312, EmptinessCheckTime: 0.4s, AutomataDifference: 250.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52267 SdHoareTripleChecker+Valid, 99.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52267 mSDsluCounter, 100554 SdHoareTripleChecker+Invalid, 82.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 33742 IncrementalHoareTripleChecker+Unchecked, 217786 mSDsCounter, 9819 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 263483 IncrementalHoareTripleChecker+Invalid, 307044 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9819 mSolverCounterUnsat, 9060 mSDtfsCounter, 263483 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21829 GetRequests, 10811 SyntacticMatches, 332 SemanticMatches, 10686 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 114423 ImplicationChecksByTransitivity, 206.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2926occurred in iteration=319, InterpolantAutomatonStates: 6982, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.4s AutomataMinimizationTime, 328 MinimizatonAttempts, 133800 StatesRemovedByMinimization, 323 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 344.8s InterpolantComputationTime, 13993 NumberOfCodeBlocks, 13972 NumberOfCodeBlocksAsserted, 978 NumberOfCheckSat, 19917 ConstructedInterpolants, 748 QuantifiedInterpolants, 175932 SizeOfPredicates, 3715 NumberOfNonLiveVariables, 31765 ConjunctsInSsa, 6307 ConjunctsInUnsatCore, 952 InterpolantComputations, 16 PerfectInterpolantSequences, 1836/6652 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