/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:27:02,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:27:02,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:27:02,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:27:03,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:27:03,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:27:03,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:27:03,003 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 [2022-02-11 01:27:03,025 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:27:03,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:27:03,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:27:03,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:27:03,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:27:03,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:27:03,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:27:03,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:27:03,027 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:27:03,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:27:03,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:27:03,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:27:03,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:27:03,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:27:03,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:27:03,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:27:03,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:27:03,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:27:03,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:27:03,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:27:03,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:27:03,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:27:03,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:27:03,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:27:03,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:27:03,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:27:03,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:27:03,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:27:03,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:27:03,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:27:03,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:27:03,031 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:27:03,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:27:03,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:27:03,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:27:03,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:27:03,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:27:03,307 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:27:03,308 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:27:03,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl [2022-02-11 01:27:03,310 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl' [2022-02-11 01:27:03,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:27:03,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:27:03,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:27:03,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:27:03,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:27:03,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,357 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:27:03,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:27:03,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:27:03,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:27:03,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:27:03,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:27:03,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:27:03,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:27:03,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:27:03,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/1) ... [2022-02-11 01:27:03,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:27:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:03,406 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) [2022-02-11 01:27:03,417 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 [2022-02-11 01:27:03,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:27:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:27:03,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:27:03,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:27:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:27:03,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:27:03,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:27:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:27:03,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:27:03,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 01:27:03,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 01:27:03,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 01:27:03,437 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:27:03,470 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:27:03,471 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:27:03,557 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:27:03,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:27:03,567 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:27:03,569 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:27:03 BoogieIcfgContainer [2022-02-11 01:27:03,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:27:03,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:27:03,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:27:03,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:27:03,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:27:03" (1/2) ... [2022-02-11 01:27:03,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2359a599 and model type min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:27:03, skipping insertion in model container [2022-02-11 01:27:03,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:27:03" (2/2) ... [2022-02-11 01:27:03,592 INFO L112 eAbstractionObserver]: Analyzing ICFG min-array.wvr.bpl [2022-02-11 01:27:03,595 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:27:03,596 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:27:03,596 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:27:03,596 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:27:03,635 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 01:27:03,713 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:27:03,719 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 [2022-02-11 01:27:03,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 01:27:03,730 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-02-11 01:27:03,774 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:27:03,795 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:03,796 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:03,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-02-11 01:27:03,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:03,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651518834] [2022-02-11 01:27:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:03,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:03,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651518834] [2022-02-11 01:27:03,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651518834] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:27:03,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:27:03,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:27:03,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284823968] [2022-02-11 01:27:03,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:27:03,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:27:03,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:27:04,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:27:04,012 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:04,066 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-02-11 01:27:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:27:04,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 01:27:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:04,077 INFO L225 Difference]: With dead ends: 217 [2022-02-11 01:27:04,077 INFO L226 Difference]: Without dead ends: 202 [2022-02-11 01:27:04,079 INFO L933 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 [2022-02-11 01:27:04,081 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:04,082 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:27:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-11 01:27:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-02-11 01:27:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-02-11 01:27:04,163 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-02-11 01:27:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:04,164 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-02-11 01:27:04,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-02-11 01:27:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 01:27:04,165 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:04,166 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:27:04,166 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:04,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-02-11 01:27:04,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:04,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276886162] [2022-02-11 01:27:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:04,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:04,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:04,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276886162] [2022-02-11 01:27:04,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276886162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:27:04,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:27:04,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:27:04,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100421832] [2022-02-11 01:27:04,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:27:04,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:27:04,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:27:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:27:04,214 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:04,274 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-02-11 01:27:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:27:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 01:27:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:04,277 INFO L225 Difference]: With dead ends: 158 [2022-02-11 01:27:04,277 INFO L226 Difference]: Without dead ends: 158 [2022-02-11 01:27:04,277 INFO L933 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 [2022-02-11 01:27:04,278 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:04,278 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:27:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-11 01:27:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-02-11 01:27:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 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) [2022-02-11 01:27:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-02-11 01:27:04,297 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-02-11 01:27:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:04,298 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-02-11 01:27:04,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-02-11 01:27:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 01:27:04,299 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:04,299 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:04,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:27:04,299 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-02-11 01:27:04,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:04,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648065168] [2022-02-11 01:27:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:04,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:04,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:04,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648065168] [2022-02-11 01:27:04,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648065168] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:27:04,352 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:27:04,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:27:04,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889606425] [2022-02-11 01:27:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:27:04,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:27:04,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:27:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:27:04,354 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:04,403 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-02-11 01:27:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:27:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 01:27:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:04,405 INFO L225 Difference]: With dead ends: 183 [2022-02-11 01:27:04,405 INFO L226 Difference]: Without dead ends: 183 [2022-02-11 01:27:04,405 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:27:04,406 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:04,407 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:27:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-11 01:27:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-02-11 01:27:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-02-11 01:27:04,416 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-02-11 01:27:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:04,416 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-02-11 01:27:04,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-02-11 01:27:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:27:04,418 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:04,418 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:04,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:27:04,418 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-02-11 01:27:04,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:04,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514607122] [2022-02-11 01:27:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:04,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:04,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514607122] [2022-02-11 01:27:04,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514607122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:04,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437580839] [2022-02-11 01:27:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:04,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:04,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:04,707 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) [2022-02-11 01:27:04,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:27:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:27:04,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:05,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:27:05,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 33 [2022-02-11 01:27:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:05,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:05,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:05,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 43 [2022-02-11 01:27:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:05,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437580839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:05,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:05,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:27:05,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639260323] [2022-02-11 01:27:05,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:05,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 01:27:05,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 01:27:05,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-11 01:27:05,600 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2022-02-11 01:27:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:05,891 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-02-11 01:27:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:27:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 22 [2022-02-11 01:27:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:05,894 INFO L225 Difference]: With dead ends: 366 [2022-02-11 01:27:05,894 INFO L226 Difference]: Without dead ends: 351 [2022-02-11 01:27:05,895 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:27:05,896 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 197 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:05,896 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 61 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:27:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-11 01:27:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-02-11 01:27:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-02-11 01:27:05,912 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-02-11 01:27:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:05,912 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-02-11 01:27:05,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2022-02-11 01:27:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-02-11 01:27:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:27:05,913 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:05,913 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:05,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:06,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:06,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-02-11 01:27:06,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:06,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866469801] [2022-02-11 01:27:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:06,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:06,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866469801] [2022-02-11 01:27:06,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866469801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:06,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67104411] [2022-02-11 01:27:06,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:27:06,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:06,352 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) [2022-02-11 01:27:06,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:27:06,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:27:06,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:06,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:27:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:06,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:06,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-02-11 01:27:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:06,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:07,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:07,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 43 [2022-02-11 01:27:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:07,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67104411] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:07,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:07,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-02-11 01:27:07,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672704835] [2022-02-11 01:27:07,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:07,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 01:27:07,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 01:27:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-11 01:27:07,181 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-02-11 01:27:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:08,024 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-02-11 01:27:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:27:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 [2022-02-11 01:27:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:08,027 INFO L225 Difference]: With dead ends: 478 [2022-02-11 01:27:08,027 INFO L226 Difference]: Without dead ends: 463 [2022-02-11 01:27:08,027 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:27:08,028 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 281 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:08,028 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 128 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-11 01:27:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-02-11 01:27:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-02-11 01:27:08,036 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-02-11 01:27:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:08,036 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-02-11 01:27:08,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-02-11 01:27:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-02-11 01:27:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:27:08,038 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:08,038 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:08,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:08,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:08,254 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-02-11 01:27:08,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:08,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273716403] [2022-02-11 01:27:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:08,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:08,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273716403] [2022-02-11 01:27:08,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273716403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:08,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712303571] [2022-02-11 01:27:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:27:08,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:08,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:08,392 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) [2022-02-11 01:27:08,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:27:08,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:27:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:08,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 01:27:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:08,561 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 45 treesize of output 33 [2022-02-11 01:27:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:08,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:08,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:08,673 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 47 treesize of output 43 [2022-02-11 01:27:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:08,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712303571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:08,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:08,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:27:08,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767168850] [2022-02-11 01:27:08,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:08,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:27:08,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:27:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:27:08,800 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2022-02-11 01:27:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:09,135 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-02-11 01:27:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:27:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 [2022-02-11 01:27:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:09,137 INFO L225 Difference]: With dead ends: 418 [2022-02-11 01:27:09,137 INFO L226 Difference]: Without dead ends: 403 [2022-02-11 01:27:09,137 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:27:09,138 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:09,138 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 122 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-11 01:27:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-02-11 01:27:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-02-11 01:27:09,145 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-02-11 01:27:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:09,145 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-02-11 01:27:09,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2022-02-11 01:27:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-02-11 01:27:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:27:09,146 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:09,146 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:09,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:09,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:09,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-02-11 01:27:09,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:09,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855764621] [2022-02-11 01:27:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:09,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:09,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855764621] [2022-02-11 01:27:09,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855764621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:09,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361379371] [2022-02-11 01:27:09,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:27:09,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:09,520 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) [2022-02-11 01:27:09,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:27:09,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:27:09,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:27:09,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:09,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:09,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-02-11 01:27:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:09,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:09,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:09,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 43 [2022-02-11 01:27:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:10,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361379371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:10,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:10,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 01:27:10,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642260056] [2022-02-11 01:27:10,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:10,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:27:10,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:27:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:27:10,136 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-02-11 01:27:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:10,408 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-02-11 01:27:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:27:10,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 [2022-02-11 01:27:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:10,414 INFO L225 Difference]: With dead ends: 381 [2022-02-11 01:27:10,414 INFO L226 Difference]: Without dead ends: 366 [2022-02-11 01:27:10,415 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-11 01:27:10,415 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:10,415 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 135 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 318 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-02-11 01:27:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-02-11 01:27:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-02-11 01:27:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-02-11 01:27:10,422 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-02-11 01:27:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:10,422 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-02-11 01:27:10,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-02-11 01:27:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-02-11 01:27:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:27:10,423 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:10,423 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:10,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:10,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:10,636 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-02-11 01:27:10,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:10,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095567224] [2022-02-11 01:27:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:10,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:10,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095567224] [2022-02-11 01:27:10,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095567224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:10,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835132456] [2022-02-11 01:27:10,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:27:10,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:10,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:10,757 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) [2022-02-11 01:27:10,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:27:10,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:27:10,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:27:10,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:10,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:10,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-02-11 01:27:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:11,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:11,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:11,184 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 47 treesize of output 43 [2022-02-11 01:27:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:11,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835132456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:11,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:11,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-11 01:27:11,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411392315] [2022-02-11 01:27:11,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:11,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:27:11,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:27:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:27:11,327 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-02-11 01:27:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:12,031 INFO L93 Difference]: Finished difference Result 672 states and 1913 transitions. [2022-02-11 01:27:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 01:27:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 22 [2022-02-11 01:27:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:12,034 INFO L225 Difference]: With dead ends: 672 [2022-02-11 01:27:12,034 INFO L226 Difference]: Without dead ends: 657 [2022-02-11 01:27:12,035 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:27:12,035 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 247 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:12,035 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 135 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-02-11 01:27:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 253. [2022-02-11 01:27:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9404761904761907) internal successors, (741), 252 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 741 transitions. [2022-02-11 01:27:12,043 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 741 transitions. Word has length 22 [2022-02-11 01:27:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:12,045 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 741 transitions. [2022-02-11 01:27:12,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-02-11 01:27:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 741 transitions. [2022-02-11 01:27:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:27:12,046 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:12,046 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:12,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:12,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:12,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash 70299084, now seen corresponding path program 6 times [2022-02-11 01:27:12,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:12,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222710633] [2022-02-11 01:27:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:12,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:12,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:12,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222710633] [2022-02-11 01:27:12,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222710633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:12,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105070743] [2022-02-11 01:27:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:27:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:12,416 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) [2022-02-11 01:27:12,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:27:12,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:27:12,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:12,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:27:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:12,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-02-11 01:27:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:12,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:12,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:12,811 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 47 treesize of output 43 [2022-02-11 01:27:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:12,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105070743] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:12,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:12,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-11 01:27:12,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185765455] [2022-02-11 01:27:12,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:12,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:27:12,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:12,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:27:12,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:12,969 INFO L87 Difference]: Start difference. First operand 253 states and 741 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2022-02-11 01:27:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:13,600 INFO L93 Difference]: Finished difference Result 471 states and 1359 transitions. [2022-02-11 01:27:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:27:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 22 [2022-02-11 01:27:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:13,603 INFO L225 Difference]: With dead ends: 471 [2022-02-11 01:27:13,603 INFO L226 Difference]: Without dead ends: 456 [2022-02-11 01:27:13,603 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:27:13,604 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:13,604 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 161 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-11 01:27:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 247. [2022-02-11 01:27:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-02-11 01:27:13,610 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-02-11 01:27:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-02-11 01:27:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2022-02-11 01:27:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-02-11 01:27:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:13,611 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:13,611 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:13,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:13,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:13,812 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:13,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-02-11 01:27:13,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:13,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209649007] [2022-02-11 01:27:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:13,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:13,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209649007] [2022-02-11 01:27:13,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209649007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:13,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255025313] [2022-02-11 01:27:13,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:27:13,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:13,852 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) [2022-02-11 01:27:13,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:27:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:14,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255025313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:14,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:14,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:27:14,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310049213] [2022-02-11 01:27:14,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:14,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:27:14,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:27:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:27:14,052 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-02-11 01:27:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:14,789 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-02-11 01:27:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:27:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 24 [2022-02-11 01:27:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:14,794 INFO L225 Difference]: With dead ends: 1099 [2022-02-11 01:27:14,794 INFO L226 Difference]: Without dead ends: 1099 [2022-02-11 01:27:14,795 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 01:27:14,795 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 274 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:14,795 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 211 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-11 01:27:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-02-11 01:27:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-02-11 01:27:14,806 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-02-11 01:27:14,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:14,807 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-02-11 01:27:14,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-02-11 01:27:14,808 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-02-11 01:27:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:14,808 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:14,809 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:14,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:15,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:15,026 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-02-11 01:27:15,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:15,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247111368] [2022-02-11 01:27:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:15,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:15,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247111368] [2022-02-11 01:27:15,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247111368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:15,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29661766] [2022-02-11 01:27:15,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:27:15,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:15,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:15,069 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) [2022-02-11 01:27:15,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:27:15,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:27:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:15,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:15,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29661766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:15,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:15,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:27:15,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267029566] [2022-02-11 01:27:15,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:15,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:27:15,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:27:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:27:15,307 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-02-11 01:27:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:16,562 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-02-11 01:27:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-11 01:27:16,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-02-11 01:27:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:16,569 INFO L225 Difference]: With dead ends: 1794 [2022-02-11 01:27:16,569 INFO L226 Difference]: Without dead ends: 1794 [2022-02-11 01:27:16,574 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 01:27:16,587 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 487 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:16,587 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 286 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:27:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-02-11 01:27:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-02-11 01:27:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-02-11 01:27:16,616 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-02-11 01:27:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:16,616 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-02-11 01:27:16,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-02-11 01:27:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-02-11 01:27:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:16,618 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:16,618 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:16,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:16,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-11 01:27:16,824 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-02-11 01:27:16,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:16,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853596123] [2022-02-11 01:27:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:16,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:16,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853596123] [2022-02-11 01:27:16,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853596123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:16,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013997600] [2022-02-11 01:27:16,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:27:16,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:16,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:16,862 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) [2022-02-11 01:27:16,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:27:16,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:27:16,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:16,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:16,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:17,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013997600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:17,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:17,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:27:17,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333559593] [2022-02-11 01:27:17,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:17,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:27:17,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:27:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:27:17,092 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-02-11 01:27:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:17,980 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-02-11 01:27:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:27:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-02-11 01:27:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:17,986 INFO L225 Difference]: With dead ends: 1470 [2022-02-11 01:27:17,986 INFO L226 Difference]: Without dead ends: 1470 [2022-02-11 01:27:17,987 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 01:27:17,988 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 430 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:17,988 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 249 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:27:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-02-11 01:27:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-02-11 01:27:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-02-11 01:27:18,000 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-02-11 01:27:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:18,000 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-02-11 01:27:18,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-02-11 01:27:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-02-11 01:27:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:18,001 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:18,001 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:18,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:18,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:18,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-02-11 01:27:18,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:18,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088651419] [2022-02-11 01:27:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:18,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:18,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:18,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088651419] [2022-02-11 01:27:18,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088651419] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:18,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795850075] [2022-02-11 01:27:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:18,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:18,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:18,259 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) [2022-02-11 01:27:18,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:27:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:18,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:27:18,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:18,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:18,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795850075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:18,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:18,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:27:18,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007527389] [2022-02-11 01:27:18,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:18,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:27:18,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:27:18,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:27:18,422 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:18,582 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-02-11 01:27:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:27:18,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:18,585 INFO L225 Difference]: With dead ends: 685 [2022-02-11 01:27:18,585 INFO L226 Difference]: Without dead ends: 679 [2022-02-11 01:27:18,585 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:18,586 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:18,586 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 38 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:27:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-11 01:27:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-02-11 01:27:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-02-11 01:27:18,595 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-02-11 01:27:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:18,595 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-02-11 01:27:18,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-02-11 01:27:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:18,596 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:18,596 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:18,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:18,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-11 01:27:18,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-02-11 01:27:18,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:18,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842837827] [2022-02-11 01:27:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:18,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:18,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:18,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842837827] [2022-02-11 01:27:18,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842837827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:18,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254964431] [2022-02-11 01:27:18,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:27:18,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:18,857 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) [2022-02-11 01:27:18,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:27:18,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:27:18,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:18,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:18,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:19,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254964431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:19,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:19,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:27:19,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565020181] [2022-02-11 01:27:19,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:19,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:27:19,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:27:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:27:19,020 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-11 01:27:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:19,292 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-02-11 01:27:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 01:27:19,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 24 [2022-02-11 01:27:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:19,296 INFO L225 Difference]: With dead ends: 1159 [2022-02-11 01:27:19,296 INFO L226 Difference]: Without dead ends: 1111 [2022-02-11 01:27:19,297 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:27:19,297 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 233 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:19,297 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 124 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:27:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-02-11 01:27:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-02-11 01:27:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-02-11 01:27:19,325 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-02-11 01:27:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:19,325 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-02-11 01:27:19,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-11 01:27:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-02-11 01:27:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:19,326 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:19,326 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:19,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:19,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-11 01:27:19,539 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:19,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-02-11 01:27:19,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:19,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848616937] [2022-02-11 01:27:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:19,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:19,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:19,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848616937] [2022-02-11 01:27:19,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848616937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:19,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698613550] [2022-02-11 01:27:19,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:27:19,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:19,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:19,578 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) [2022-02-11 01:27:19,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:27:19,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:27:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:27:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:19,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:19,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698613550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:19,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:19,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:27:19,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315420729] [2022-02-11 01:27:19,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:19,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:27:19,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:27:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:27:19,717 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:19,901 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-02-11 01:27:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:27:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:19,905 INFO L225 Difference]: With dead ends: 1267 [2022-02-11 01:27:19,905 INFO L226 Difference]: Without dead ends: 1267 [2022-02-11 01:27:19,907 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:27:19,907 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:19,908 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 68 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:27:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-11 01:27:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-02-11 01:27:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-02-11 01:27:19,923 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-02-11 01:27:19,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:19,924 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-02-11 01:27:19,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-02-11 01:27:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:19,926 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:19,926 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:19,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:20,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-11 01:27:20,142 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-02-11 01:27:20,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:20,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594548869] [2022-02-11 01:27:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:20,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:20,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:20,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594548869] [2022-02-11 01:27:20,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594548869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:20,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733641527] [2022-02-11 01:27:20,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:27:20,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:20,181 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) [2022-02-11 01:27:20,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:27:20,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:27:20,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:20,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:20,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:20,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733641527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:20,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:20,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:27:20,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203814272] [2022-02-11 01:27:20,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:20,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:27:20,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:27:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:27:20,317 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-02-11 01:27:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:20,823 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-02-11 01:27:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:27:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:20,831 INFO L225 Difference]: With dead ends: 2268 [2022-02-11 01:27:20,831 INFO L226 Difference]: Without dead ends: 2268 [2022-02-11 01:27:20,831 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:27:20,832 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 254 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:20,832 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 168 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-02-11 01:27:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-02-11 01:27:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-02-11 01:27:20,854 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-02-11 01:27:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-02-11 01:27:20,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-02-11 01:27:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-02-11 01:27:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:20,856 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:20,856 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:20,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:21,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-11 01:27:21,072 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-02-11 01:27:21,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:21,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237340279] [2022-02-11 01:27:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:21,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:21,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:21,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237340279] [2022-02-11 01:27:21,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237340279] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:21,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031031052] [2022-02-11 01:27:21,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:27:21,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:21,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:21,120 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) [2022-02-11 01:27:21,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:27:21,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:27:21,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:21,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:21,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:21,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031031052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:21,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:21,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:27:21,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816927874] [2022-02-11 01:27:21,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:21,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:27:21,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:27:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:27:21,287 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-02-11 01:27:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:21,936 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-02-11 01:27:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:27:21,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:21,945 INFO L225 Difference]: With dead ends: 2256 [2022-02-11 01:27:21,945 INFO L226 Difference]: Without dead ends: 2256 [2022-02-11 01:27:21,946 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:27:21,947 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 271 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:21,947 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 163 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-02-11 01:27:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-02-11 01:27:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-02-11 01:27:21,973 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-02-11 01:27:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:21,974 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-02-11 01:27:21,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-02-11 01:27:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-02-11 01:27:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:21,978 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:21,978 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:21,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:22,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:22,191 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-02-11 01:27:22,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:22,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482820747] [2022-02-11 01:27:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:22,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:22,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482820747] [2022-02-11 01:27:22,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482820747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:22,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482345749] [2022-02-11 01:27:22,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:27:22,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:22,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:22,226 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) [2022-02-11 01:27:22,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:27:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:22,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:22,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482345749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:22,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:22,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-11 01:27:22,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923605214] [2022-02-11 01:27:22,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:22,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:27:22,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:27:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:27:22,404 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:22,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:22,691 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-02-11 01:27:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:27:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:22,698 INFO L225 Difference]: With dead ends: 1611 [2022-02-11 01:27:22,698 INFO L226 Difference]: Without dead ends: 1611 [2022-02-11 01:27:22,698 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:27:22,699 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 227 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:22,699 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 110 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:22,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-02-11 01:27:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-02-11 01:27:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-02-11 01:27:22,721 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-02-11 01:27:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:22,721 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-02-11 01:27:22,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-02-11 01:27:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:22,723 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:22,723 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:22,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-11 01:27:22,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-11 01:27:22,954 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-02-11 01:27:22,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:22,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329927369] [2022-02-11 01:27:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:22,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:22,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329927369] [2022-02-11 01:27:22,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329927369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:22,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650066208] [2022-02-11 01:27:22,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:27:22,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:22,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:22,987 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) [2022-02-11 01:27:22,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:27:23,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:27:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:23,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:23,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:23,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:23,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650066208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:23,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:23,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:27:23,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201763775] [2022-02-11 01:27:23,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:23,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:27:23,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:27:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:27:23,158 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-02-11 01:27:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:23,719 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-02-11 01:27:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:27:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:23,725 INFO L225 Difference]: With dead ends: 2408 [2022-02-11 01:27:23,725 INFO L226 Difference]: Without dead ends: 2404 [2022-02-11 01:27:23,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:27:23,726 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 295 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:23,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 142 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-02-11 01:27:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-02-11 01:27:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-02-11 01:27:23,752 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-02-11 01:27:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:23,752 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-02-11 01:27:23,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-02-11 01:27:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-02-11 01:27:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:23,754 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:23,754 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:23,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:23,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:23,972 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-02-11 01:27:23,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:23,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173319162] [2022-02-11 01:27:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:24,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:24,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173319162] [2022-02-11 01:27:24,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173319162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:24,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847140156] [2022-02-11 01:27:24,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:27:24,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:24,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:24,042 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) [2022-02-11 01:27:24,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:27:24,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:27:24,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:24,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:24,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:24,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847140156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:24,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:24,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:27:24,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496367448] [2022-02-11 01:27:24,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:24,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:27:24,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:27:24,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:24,209 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:25,128 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-02-11 01:27:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 01:27:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-02-11 01:27:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:25,136 INFO L225 Difference]: With dead ends: 3509 [2022-02-11 01:27:25,136 INFO L226 Difference]: Without dead ends: 3509 [2022-02-11 01:27:25,138 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:27:25,138 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 526 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:25,138 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 260 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:27:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-02-11 01:27:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-02-11 01:27:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-02-11 01:27:25,169 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-02-11 01:27:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:25,169 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-02-11 01:27:25,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-02-11 01:27:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:25,171 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:25,171 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:25,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:25,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:25,378 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-02-11 01:27:25,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:25,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661379221] [2022-02-11 01:27:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:25,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:25,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661379221] [2022-02-11 01:27:25,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661379221] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:25,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178696871] [2022-02-11 01:27:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:27:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:25,435 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) [2022-02-11 01:27:25,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:27:25,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:27:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:25,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:25,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:25,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178696871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:25,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:25,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:27:25,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538712619] [2022-02-11 01:27:25,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:25,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:27:25,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:27:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:25,632 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:26,825 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-02-11 01:27:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:27:26,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-02-11 01:27:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:26,833 INFO L225 Difference]: With dead ends: 3211 [2022-02-11 01:27:26,833 INFO L226 Difference]: Without dead ends: 3207 [2022-02-11 01:27:26,834 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 01:27:26,835 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 442 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:26,835 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 286 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:27:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-02-11 01:27:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-02-11 01:27:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-02-11 01:27:26,868 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-02-11 01:27:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:26,868 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-02-11 01:27:26,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-02-11 01:27:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:26,871 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:26,871 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:26,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-11 01:27:27,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:27,083 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-02-11 01:27:27,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:27,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284323693] [2022-02-11 01:27:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:27,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:27,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284323693] [2022-02-11 01:27:27,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284323693] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:27,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496879592] [2022-02-11 01:27:27,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:27:27,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:27,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:27,121 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) [2022-02-11 01:27:27,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:27:27,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:27:27,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:27:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:27,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:27,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496879592] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:27,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:27,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-11 01:27:27,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675836848] [2022-02-11 01:27:27,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:27,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:27:27,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:27,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:27:27,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:27:27,301 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-02-11 01:27:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:27,422 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-02-11 01:27:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:27:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:27,425 INFO L225 Difference]: With dead ends: 1333 [2022-02-11 01:27:27,425 INFO L226 Difference]: Without dead ends: 1333 [2022-02-11 01:27:27,426 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:27:27,426 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:27,426 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 51 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:27:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-02-11 01:27:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-02-11 01:27:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-02-11 01:27:27,444 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-02-11 01:27:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:27,444 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-02-11 01:27:27,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-02-11 01:27:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-02-11 01:27:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:27,446 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:27,446 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:27,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:27,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:27,663 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-02-11 01:27:27,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:27,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724287799] [2022-02-11 01:27:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:27,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:27,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:27,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724287799] [2022-02-11 01:27:27,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724287799] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:27,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726400112] [2022-02-11 01:27:27,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:27:27,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:27,703 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) [2022-02-11 01:27:27,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:27:27,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:27:27,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:27,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:27,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726400112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:27,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:27,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:27:27,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980489695] [2022-02-11 01:27:27,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:27,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:27:27,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:27:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:27:27,858 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-02-11 01:27:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:28,228 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-02-11 01:27:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:27:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-02-11 01:27:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:28,233 INFO L225 Difference]: With dead ends: 2129 [2022-02-11 01:27:28,233 INFO L226 Difference]: Without dead ends: 2129 [2022-02-11 01:27:28,233 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:27:28,233 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:28,234 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 142 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:28,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-02-11 01:27:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-02-11 01:27:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-02-11 01:27:28,256 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-02-11 01:27:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:28,256 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-02-11 01:27:28,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-02-11 01:27:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-02-11 01:27:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:28,258 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:28,258 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:28,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:28,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-11 01:27:28,473 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-02-11 01:27:28,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:28,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672368015] [2022-02-11 01:27:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:28,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:28,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672368015] [2022-02-11 01:27:28,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672368015] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:28,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837701357] [2022-02-11 01:27:28,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:27:28,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:28,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:28,509 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) [2022-02-11 01:27:28,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:27:28,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:27:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:28,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:28,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837701357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:28,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:28,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 01:27:28,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864361381] [2022-02-11 01:27:28,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:28,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:27:28,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:28,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:27:28,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:27:28,671 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-11 01:27:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:29,035 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-02-11 01:27:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:27:29,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-02-11 01:27:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:29,042 INFO L225 Difference]: With dead ends: 2262 [2022-02-11 01:27:29,042 INFO L226 Difference]: Without dead ends: 2262 [2022-02-11 01:27:29,042 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:27:29,043 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 189 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:29,043 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 129 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-02-11 01:27:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-02-11 01:27:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-02-11 01:27:29,070 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-02-11 01:27:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:29,070 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-02-11 01:27:29,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-11 01:27:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-02-11 01:27:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:29,073 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:29,073 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:29,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:29,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-11 01:27:29,290 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-02-11 01:27:29,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:29,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162715104] [2022-02-11 01:27:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:29,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:29,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:29,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162715104] [2022-02-11 01:27:29,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162715104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:29,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579170517] [2022-02-11 01:27:29,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:27:29,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:29,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:29,329 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) [2022-02-11 01:27:29,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:27:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:29,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:29,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:29,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579170517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:29,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:29,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-11 01:27:29,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233957762] [2022-02-11 01:27:29,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:29,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:27:29,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:29,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:27:29,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:27:29,485 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-02-11 01:27:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:29,757 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-02-11 01:27:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 01:27:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-02-11 01:27:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:29,761 INFO L225 Difference]: With dead ends: 1474 [2022-02-11 01:27:29,761 INFO L226 Difference]: Without dead ends: 1464 [2022-02-11 01:27:29,761 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:27:29,762 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:29,762 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 154 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-02-11 01:27:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-02-11 01:27:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-02-11 01:27:29,788 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-02-11 01:27:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:29,788 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-02-11 01:27:29,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-02-11 01:27:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-02-11 01:27:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:29,790 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:29,790 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:29,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:30,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:30,001 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-02-11 01:27:30,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:30,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475011067] [2022-02-11 01:27:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:30,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:30,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475011067] [2022-02-11 01:27:30,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475011067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:30,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389632802] [2022-02-11 01:27:30,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:27:30,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:30,032 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) [2022-02-11 01:27:30,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:27:30,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:27:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:30,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:30,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:30,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389632802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:30,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:30,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 01:27:30,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859786552] [2022-02-11 01:27:30,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:30,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:27:30,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:27:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:27:30,165 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-11 01:27:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:30,397 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-02-11 01:27:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:27:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-02-11 01:27:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:30,402 INFO L225 Difference]: With dead ends: 2318 [2022-02-11 01:27:30,402 INFO L226 Difference]: Without dead ends: 2314 [2022-02-11 01:27:30,402 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:27:30,404 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 193 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:30,404 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 107 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:27:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-02-11 01:27:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-02-11 01:27:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-02-11 01:27:30,429 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-02-11 01:27:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:30,429 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-02-11 01:27:30,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-11 01:27:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-02-11 01:27:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:30,431 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:30,431 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:30,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-11 01:27:30,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:30,639 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-02-11 01:27:30,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:30,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356126954] [2022-02-11 01:27:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:30,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:30,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:30,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356126954] [2022-02-11 01:27:30,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356126954] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:30,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297628744] [2022-02-11 01:27:30,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:27:30,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:30,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:30,692 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) [2022-02-11 01:27:30,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:27:30,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:27:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:30,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:30,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297628744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:30,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:30,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:27:30,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465554745] [2022-02-11 01:27:30,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:30,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:27:30,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:30,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:27:30,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:27:30,840 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-02-11 01:27:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:31,162 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-02-11 01:27:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 01:27:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-02-11 01:27:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:31,167 INFO L225 Difference]: With dead ends: 2302 [2022-02-11 01:27:31,167 INFO L226 Difference]: Without dead ends: 2290 [2022-02-11 01:27:31,167 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:27:31,168 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:31,168 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 148 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:31,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-02-11 01:27:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-02-11 01:27:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-02-11 01:27:31,193 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-02-11 01:27:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:31,193 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-02-11 01:27:31,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-02-11 01:27:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-02-11 01:27:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:31,195 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:31,195 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:31,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:31,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-11 01:27:31,409 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-02-11 01:27:31,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:31,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337407979] [2022-02-11 01:27:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:31,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:31,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337407979] [2022-02-11 01:27:31,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337407979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:31,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615568786] [2022-02-11 01:27:31,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:27:31,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:31,449 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) [2022-02-11 01:27:31,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:27:31,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:27:31,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:31,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:31,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615568786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:31,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:31,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:27:31,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333103805] [2022-02-11 01:27:31,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:31,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:27:31,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:27:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:31,666 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-02-11 01:27:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:32,509 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-02-11 01:27:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:27:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-02-11 01:27:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:32,522 INFO L225 Difference]: With dead ends: 4760 [2022-02-11 01:27:32,522 INFO L226 Difference]: Without dead ends: 4760 [2022-02-11 01:27:32,523 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:27:32,523 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 475 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:32,523 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 197 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-02-11 01:27:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-02-11 01:27:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-02-11 01:27:32,566 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-02-11 01:27:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:32,566 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-02-11 01:27:32,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-02-11 01:27:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-02-11 01:27:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:32,568 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:32,569 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:32,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:32,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 01:27:32,784 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:32,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-02-11 01:27:32,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:32,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810577075] [2022-02-11 01:27:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:32,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:32,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:32,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810577075] [2022-02-11 01:27:32,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810577075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:32,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304330967] [2022-02-11 01:27:32,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:27:32,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:32,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:32,825 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) [2022-02-11 01:27:32,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:27:32,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:27:32,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:32,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:33,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304330967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:33,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:33,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:27:33,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489697913] [2022-02-11 01:27:33,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:33,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:27:33,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:33,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:27:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:33,029 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-02-11 01:27:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:33,748 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-02-11 01:27:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:27:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-02-11 01:27:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:33,757 INFO L225 Difference]: With dead ends: 4260 [2022-02-11 01:27:33,757 INFO L226 Difference]: Without dead ends: 4260 [2022-02-11 01:27:33,758 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:27:33,758 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 370 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:33,758 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 200 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-02-11 01:27:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-02-11 01:27:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-02-11 01:27:33,803 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-02-11 01:27:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:33,803 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-02-11 01:27:33,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-02-11 01:27:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-02-11 01:27:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:33,805 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:33,805 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:33,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:34,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 01:27:34,021 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-02-11 01:27:34,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:34,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502372413] [2022-02-11 01:27:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:34,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:34,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502372413] [2022-02-11 01:27:34,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502372413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:34,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109378928] [2022-02-11 01:27:34,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:27:34,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:34,055 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) [2022-02-11 01:27:34,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:27:34,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:27:34,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:34,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:34,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:34,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109378928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:34,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:34,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-11 01:27:34,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494374082] [2022-02-11 01:27:34,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:34,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:27:34,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:27:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:27:34,200 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:34,645 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-02-11 01:27:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:27:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:34,654 INFO L225 Difference]: With dead ends: 4602 [2022-02-11 01:27:34,654 INFO L226 Difference]: Without dead ends: 4602 [2022-02-11 01:27:34,656 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:27:34,657 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 327 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:34,657 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 198 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-02-11 01:27:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-02-11 01:27:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-02-11 01:27:34,711 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-02-11 01:27:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:34,711 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-02-11 01:27:34,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-02-11 01:27:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:34,714 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:34,714 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:34,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:34,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:34,930 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-02-11 01:27:34,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:34,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890696329] [2022-02-11 01:27:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:34,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:34,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:34,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890696329] [2022-02-11 01:27:34,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890696329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:34,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433319122] [2022-02-11 01:27:34,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:27:34,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:34,966 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) [2022-02-11 01:27:34,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 01:27:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:35,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:35,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433319122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:35,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:35,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-11 01:27:35,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275688651] [2022-02-11 01:27:35,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:35,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:27:35,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:27:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:27:35,127 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:35,518 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-02-11 01:27:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:27:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:35,526 INFO L225 Difference]: With dead ends: 4348 [2022-02-11 01:27:35,527 INFO L226 Difference]: Without dead ends: 4344 [2022-02-11 01:27:35,528 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:27:35,528 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 359 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:35,528 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 172 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-02-11 01:27:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-02-11 01:27:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-02-11 01:27:35,608 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-02-11 01:27:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:35,609 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-02-11 01:27:35,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-02-11 01:27:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:35,611 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:35,611 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:35,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-11 01:27:35,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:35,829 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-02-11 01:27:35,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:35,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74935007] [2022-02-11 01:27:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:35,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:35,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74935007] [2022-02-11 01:27:35,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74935007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:35,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173284914] [2022-02-11 01:27:35,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:27:35,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:35,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:35,865 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) [2022-02-11 01:27:35,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 01:27:35,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:27:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:35,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:35,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:35,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:36,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173284914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:36,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:36,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:27:36,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701724907] [2022-02-11 01:27:36,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:36,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:27:36,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:27:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:36,028 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:36,624 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-02-11 01:27:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:27:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-02-11 01:27:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:36,631 INFO L225 Difference]: With dead ends: 4035 [2022-02-11 01:27:36,631 INFO L226 Difference]: Without dead ends: 4035 [2022-02-11 01:27:36,632 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 01:27:36,632 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 518 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:36,632 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 208 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-02-11 01:27:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-02-11 01:27:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-02-11 01:27:36,674 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-02-11 01:27:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:36,674 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-02-11 01:27:36,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-02-11 01:27:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:36,677 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:36,677 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:36,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-11 01:27:36,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:36,893 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-02-11 01:27:36,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:36,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599757150] [2022-02-11 01:27:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:36,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:36,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:36,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599757150] [2022-02-11 01:27:36,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599757150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:36,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599079887] [2022-02-11 01:27:36,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:27:36,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:36,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:36,934 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) [2022-02-11 01:27:36,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 01:27:36,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:27:36,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:37,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:27:37,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599079887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:37,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:37,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:27:37,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883850129] [2022-02-11 01:27:37,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:37,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:27:37,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:27:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:27:37,056 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:37,619 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-02-11 01:27:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:27:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-02-11 01:27:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:37,625 INFO L225 Difference]: With dead ends: 3794 [2022-02-11 01:27:37,625 INFO L226 Difference]: Without dead ends: 3790 [2022-02-11 01:27:37,625 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:27:37,626 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 407 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:37,626 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 188 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-02-11 01:27:37,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-02-11 01:27:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-02-11 01:27:37,662 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-02-11 01:27:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:37,662 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-02-11 01:27:37,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-02-11 01:27:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-02-11 01:27:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:37,665 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:37,665 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:37,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:37,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-11 01:27:37,866 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-02-11 01:27:37,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:37,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282785198] [2022-02-11 01:27:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:37,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:37,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:37,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282785198] [2022-02-11 01:27:37,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282785198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:37,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428525030] [2022-02-11 01:27:37,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:27:37,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:37,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:37,916 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) [2022-02-11 01:27:37,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 01:27:37,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:27:37,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:38,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:38,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428525030] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:38,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:38,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:27:38,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649908136] [2022-02-11 01:27:38,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:38,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:27:38,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:27:38,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:27:38,046 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:38,493 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-02-11 01:27:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:27:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:38,501 INFO L225 Difference]: With dead ends: 3978 [2022-02-11 01:27:38,502 INFO L226 Difference]: Without dead ends: 3978 [2022-02-11 01:27:38,502 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 01:27:38,503 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 252 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:38,503 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 164 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-02-11 01:27:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-02-11 01:27:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-02-11 01:27:38,544 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-02-11 01:27:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:38,544 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-02-11 01:27:38,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-02-11 01:27:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:38,547 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:38,547 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:38,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:38,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:38,763 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:38,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-02-11 01:27:38,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:38,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421220899] [2022-02-11 01:27:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:38,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:38,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421220899] [2022-02-11 01:27:38,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421220899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:38,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063760306] [2022-02-11 01:27:38,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:27:38,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:38,805 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) [2022-02-11 01:27:38,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 01:27:38,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:27:38,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:38,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:38,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063760306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:38,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:38,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:27:38,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210943484] [2022-02-11 01:27:38,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:38,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:27:38,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:38,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:27:38,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:27:38,927 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:39,251 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-02-11 01:27:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:27:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:39,259 INFO L225 Difference]: With dead ends: 3706 [2022-02-11 01:27:39,259 INFO L226 Difference]: Without dead ends: 3702 [2022-02-11 01:27:39,259 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:27:39,260 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 324 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:39,260 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 119 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:27:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-02-11 01:27:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-02-11 01:27:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-02-11 01:27:39,323 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-02-11 01:27:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:39,323 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-02-11 01:27:39,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-02-11 01:27:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:39,326 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:39,326 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:39,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:39,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:39,527 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-02-11 01:27:39,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:39,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947149912] [2022-02-11 01:27:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:39,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:39,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:39,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947149912] [2022-02-11 01:27:39,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947149912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:39,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450253344] [2022-02-11 01:27:39,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:27:39,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:39,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:39,561 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) [2022-02-11 01:27:39,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 01:27:39,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:27:39,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:39,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:39,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450253344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:39,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:39,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:27:39,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550492045] [2022-02-11 01:27:39,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:39,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:27:39,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:27:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:27:39,664 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:40,070 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-02-11 01:27:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:27:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:40,077 INFO L225 Difference]: With dead ends: 4114 [2022-02-11 01:27:40,077 INFO L226 Difference]: Without dead ends: 4102 [2022-02-11 01:27:40,077 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:27:40,078 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:40,078 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 195 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-02-11 01:27:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-02-11 01:27:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-02-11 01:27:40,114 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-02-11 01:27:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:40,114 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-02-11 01:27:40,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-02-11 01:27:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:40,116 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:40,117 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:40,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-11 01:27:40,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-11 01:27:40,332 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-02-11 01:27:40,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:40,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371668227] [2022-02-11 01:27:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:40,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:40,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:40,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371668227] [2022-02-11 01:27:40,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371668227] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:40,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72812320] [2022-02-11 01:27:40,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:27:40,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:40,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:40,370 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) [2022-02-11 01:27:40,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 01:27:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:40,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:40,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:40,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:40,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72812320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:40,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:40,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:27:40,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393080319] [2022-02-11 01:27:40,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:40,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:27:40,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:27:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:27:40,498 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-02-11 01:27:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:40,943 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-02-11 01:27:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:27:40,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-02-11 01:27:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:40,949 INFO L225 Difference]: With dead ends: 3694 [2022-02-11 01:27:40,950 INFO L226 Difference]: Without dead ends: 3694 [2022-02-11 01:27:40,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 01:27:40,950 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 377 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:40,951 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 283 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:27:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-02-11 01:27:40,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-02-11 01:27:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-02-11 01:27:41,028 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-02-11 01:27:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-02-11 01:27:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-02-11 01:27:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-02-11 01:27:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:41,031 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:41,031 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:41,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:41,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-11 01:27:41,247 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:41,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-02-11 01:27:41,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:41,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195924320] [2022-02-11 01:27:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:41,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:41,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195924320] [2022-02-11 01:27:41,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195924320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:41,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198311564] [2022-02-11 01:27:41,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:27:41,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:41,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:41,293 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) [2022-02-11 01:27:41,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 01:27:41,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:27:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:41,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:41,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:41,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198311564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:41,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:41,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:27:41,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967690097] [2022-02-11 01:27:41,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:41,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:27:41,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:27:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:27:41,445 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-02-11 01:27:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:42,132 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-02-11 01:27:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:27:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-02-11 01:27:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:42,139 INFO L225 Difference]: With dead ends: 3420 [2022-02-11 01:27:42,139 INFO L226 Difference]: Without dead ends: 3416 [2022-02-11 01:27:42,140 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:27:42,140 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 359 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:42,142 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 194 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-02-11 01:27:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-02-11 01:27:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-02-11 01:27:42,184 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-02-11 01:27:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:42,184 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-02-11 01:27:42,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-02-11 01:27:42,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-02-11 01:27:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:27:42,187 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:42,187 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:42,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-11 01:27:42,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-11 01:27:42,403 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-02-11 01:27:42,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:42,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244127755] [2022-02-11 01:27:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:42,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:42,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244127755] [2022-02-11 01:27:42,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244127755] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:42,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734596914] [2022-02-11 01:27:42,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:27:42,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:42,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:42,444 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) [2022-02-11 01:27:42,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 01:27:42,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:27:42,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:27:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:42,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734596914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:42,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:42,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:27:42,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587262577] [2022-02-11 01:27:42,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:42,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:27:42,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:42,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:27:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:27:42,622 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:43,267 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-02-11 01:27:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:27:43,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:27:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:43,273 INFO L225 Difference]: With dead ends: 3256 [2022-02-11 01:27:43,273 INFO L226 Difference]: Without dead ends: 3244 [2022-02-11 01:27:43,273 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:27:43,274 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 251 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:43,274 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 209 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:27:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-02-11 01:27:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-02-11 01:27:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-02-11 01:27:43,309 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-02-11 01:27:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:43,309 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-02-11 01:27:43,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-02-11 01:27:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:27:43,312 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:43,312 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:43,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-11 01:27:43,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 01:27:43,528 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-02-11 01:27:43,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:43,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427086837] [2022-02-11 01:27:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:43,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:43,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427086837] [2022-02-11 01:27:43,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427086837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:43,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709674175] [2022-02-11 01:27:43,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:27:43,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:43,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:43,960 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) [2022-02-11 01:27:43,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 01:27:43,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:27:43,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:27:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:44,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:27:44,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:27:44,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:27:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:44,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:45,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:27:45,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:45,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:27:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:46,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709674175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:46,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:46,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:27:46,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512403112] [2022-02-11 01:27:46,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:46,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:27:46,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:27:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:27:46,332 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-02-11 01:27:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:49,526 INFO L93 Difference]: Finished difference Result 4082 states and 13028 transitions. [2022-02-11 01:27:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:27:49,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 26 [2022-02-11 01:27:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:49,534 INFO L225 Difference]: With dead ends: 4082 [2022-02-11 01:27:49,534 INFO L226 Difference]: Without dead ends: 4022 [2022-02-11 01:27:49,534 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=906, Invalid=3650, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:27:49,535 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 607 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:49,535 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 322 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:27:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2022-02-11 01:27:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 1792. [2022-02-11 01:27:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-02-11 01:27:49,577 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-02-11 01:27:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-02-11 01:27:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-02-11 01:27:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-02-11 01:27:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:27:49,580 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:49,580 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:49,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:49,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 01:27:49,796 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-02-11 01:27:49,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:49,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294183623] [2022-02-11 01:27:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:50,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:50,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294183623] [2022-02-11 01:27:50,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294183623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:50,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210322876] [2022-02-11 01:27:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:27:50,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:50,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:50,149 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) [2022-02-11 01:27:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 01:27:50,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:27:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:27:50,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:27:50,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:27:50,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:27:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:50,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:51,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:27:51,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:27:51,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:27:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:52,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210322876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:52,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:52,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:27:52,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10791703] [2022-02-11 01:27:52,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:52,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:27:52,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:27:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:27:52,098 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:27:56,446 INFO L93 Difference]: Finished difference Result 4155 states and 13266 transitions. [2022-02-11 01:27:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:27:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:27:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:27:56,453 INFO L225 Difference]: With dead ends: 4155 [2022-02-11 01:27:56,453 INFO L226 Difference]: Without dead ends: 4125 [2022-02-11 01:27:56,454 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 01:27:56,454 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 555 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:27:56,454 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 351 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1322 Invalid, 0 Unknown, 71 Unchecked, 0.8s Time] [2022-02-11 01:27:56,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-02-11 01:27:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 1818. [2022-02-11 01:27:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.5833791964777104) internal successors, (6511), 1817 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6511 transitions. [2022-02-11 01:27:56,490 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6511 transitions. Word has length 26 [2022-02-11 01:27:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:27:56,490 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6511 transitions. [2022-02-11 01:27:56,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:27:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6511 transitions. [2022-02-11 01:27:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:27:56,493 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:27:56,493 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:27:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 01:27:56,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-11 01:27:56,706 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:27:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:27:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-02-11 01:27:56,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:27:56,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311710875] [2022-02-11 01:27:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:27:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:27:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:27:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:57,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:27:57,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311710875] [2022-02-11 01:27:57,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311710875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:27:57,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743404780] [2022-02-11 01:27:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:27:57,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:27:57,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:27:57,181 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) [2022-02-11 01:27:57,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 01:27:57,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:27:57,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:27:57,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:27:57,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:27:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:27:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:27:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:27:57,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:27:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:57,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:27:58,382 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:27:58,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:27:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:27:58,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743404780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:27:58,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:27:58,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-11 01:27:58,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696779862] [2022-02-11 01:27:58,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:27:58,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:27:58,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:27:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:27:58,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:27:58,879 INFO L87 Difference]: Start difference. First operand 1818 states and 6511 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:28:03,999 INFO L93 Difference]: Finished difference Result 3781 states and 12664 transitions. [2022-02-11 01:28:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 01:28:03,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:28:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:28:04,007 INFO L225 Difference]: With dead ends: 3781 [2022-02-11 01:28:04,007 INFO L226 Difference]: Without dead ends: 3751 [2022-02-11 01:28:04,008 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1171, Invalid=7019, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 01:28:04,008 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 375 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:28:04,010 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 322 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1683 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:28:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-02-11 01:28:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 1891. [2022-02-11 01:28:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 3.5783068783068783) internal successors, (6763), 1890 states have internal predecessors, (6763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 6763 transitions. [2022-02-11 01:28:04,051 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 6763 transitions. Word has length 26 [2022-02-11 01:28:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:28:04,052 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 6763 transitions. [2022-02-11 01:28:04,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 6763 transitions. [2022-02-11 01:28:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:28:04,056 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:28:04,056 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:28:04,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 01:28:04,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-11 01:28:04,272 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:28:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:28:04,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2022-02-11 01:28:04,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:28:04,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549207656] [2022-02-11 01:28:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:28:04,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:28:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:04,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:28:04,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549207656] [2022-02-11 01:28:04,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549207656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:28:04,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222585992] [2022-02-11 01:28:04,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:28:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:04,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:28:04,728 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) [2022-02-11 01:28:04,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 01:28:04,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:28:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:28:04,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:28:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:28:05,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:05,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:28:05,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:28:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:05,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:28:06,076 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:28:06,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:28:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:07,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222585992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:28:07,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:28:07,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:28:07,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822276835] [2022-02-11 01:28:07,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:28:07,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:28:07,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:28:07,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:28:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:28:07,032 INFO L87 Difference]: Start difference. First operand 1891 states and 6763 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:28:13,868 INFO L93 Difference]: Finished difference Result 4670 states and 14888 transitions. [2022-02-11 01:28:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 01:28:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:28:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:28:13,877 INFO L225 Difference]: With dead ends: 4670 [2022-02-11 01:28:13,877 INFO L226 Difference]: Without dead ends: 4610 [2022-02-11 01:28:13,878 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1236, Invalid=7884, Unknown=0, NotChecked=0, Total=9120 [2022-02-11 01:28:13,879 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 503 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 3308 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:28:13,880 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 711 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3308 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 01:28:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-02-11 01:28:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 1942. [2022-02-11 01:28:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.573415765069552) internal successors, (6936), 1941 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6936 transitions. [2022-02-11 01:28:13,947 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6936 transitions. Word has length 26 [2022-02-11 01:28:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:28:13,947 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6936 transitions. [2022-02-11 01:28:13,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6936 transitions. [2022-02-11 01:28:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:28:13,951 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:28:13,951 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:28:13,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 01:28:14,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-11 01:28:14,167 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:28:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:28:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-02-11 01:28:14,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:28:14,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148266545] [2022-02-11 01:28:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:28:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:28:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:14,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:28:14,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148266545] [2022-02-11 01:28:14,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148266545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:28:14,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830487135] [2022-02-11 01:28:14,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:28:14,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:28:14,565 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) [2022-02-11 01:28:14,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 01:28:14,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:28:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:28:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:28:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:28:15,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:15,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:15,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:15,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:28:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:15,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:28:15,834 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:28:15,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:28:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:16,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830487135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:28:16,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:28:16,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 01:28:16,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353574367] [2022-02-11 01:28:16,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:28:16,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:28:16,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:28:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:28:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:28:16,433 INFO L87 Difference]: Start difference. First operand 1942 states and 6936 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:28:23,045 INFO L93 Difference]: Finished difference Result 4808 states and 15717 transitions. [2022-02-11 01:28:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-11 01:28:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:28:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:28:23,055 INFO L225 Difference]: With dead ends: 4808 [2022-02-11 01:28:23,055 INFO L226 Difference]: Without dead ends: 4746 [2022-02-11 01:28:23,056 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2152, Invalid=11420, Unknown=0, NotChecked=0, Total=13572 [2022-02-11 01:28:23,056 INFO L934 BasicCegarLoop]: 53 mSDtfsCounter, 485 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:28:23,057 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 624 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:28:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2022-02-11 01:28:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 1983. [2022-02-11 01:28:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.5736629667003026) internal successors, (7083), 1982 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 7083 transitions. [2022-02-11 01:28:23,153 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 7083 transitions. Word has length 26 [2022-02-11 01:28:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:28:23,153 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 7083 transitions. [2022-02-11 01:28:23,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 7083 transitions. [2022-02-11 01:28:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:28:23,157 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:28:23,157 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:28:23,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 01:28:23,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:23,372 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:28:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:28:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-02-11 01:28:23,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:28:23,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128579903] [2022-02-11 01:28:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:28:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:28:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:23,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:28:23,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128579903] [2022-02-11 01:28:23,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128579903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:28:23,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689880661] [2022-02-11 01:28:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:28:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:28:23,623 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) [2022-02-11 01:28:23,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 01:28:23,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:28:23,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:28:23,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:28:23,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:28:24,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:24,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:24,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:24,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:24,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:28:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:24,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:28:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:24,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:28:24,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-02-11 01:28:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:24,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689880661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:28:24,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:28:24,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 01:28:24,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51195971] [2022-02-11 01:28:24,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:28:24,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:28:24,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:28:24,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:28:24,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:28:24,994 INFO L87 Difference]: Start difference. First operand 1983 states and 7083 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:28:30,874 INFO L93 Difference]: Finished difference Result 5095 states and 16333 transitions. [2022-02-11 01:28:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 01:28:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:28:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:28:30,885 INFO L225 Difference]: With dead ends: 5095 [2022-02-11 01:28:30,886 INFO L226 Difference]: Without dead ends: 5050 [2022-02-11 01:28:30,886 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1396, Invalid=7160, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:28:30,887 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 687 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:28:30,887 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 553 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:28:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2022-02-11 01:28:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 2249. [2022-02-11 01:28:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 3.538256227758007) internal successors, (7954), 2248 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 7954 transitions. [2022-02-11 01:28:30,952 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 7954 transitions. Word has length 26 [2022-02-11 01:28:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:28:30,952 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 7954 transitions. [2022-02-11 01:28:30,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 7954 transitions. [2022-02-11 01:28:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:28:30,957 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:28:30,957 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:28:30,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 01:28:31,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:31,174 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:28:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:28:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash 296771640, now seen corresponding path program 7 times [2022-02-11 01:28:31,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:28:31,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15203527] [2022-02-11 01:28:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:28:31,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:28:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:31,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:28:31,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15203527] [2022-02-11 01:28:31,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15203527] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:28:31,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061278997] [2022-02-11 01:28:31,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:28:31,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:28:31,508 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) [2022-02-11 01:28:31,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 01:28:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:31,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:28:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:28:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:31,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:31,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:28:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:32,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:28:32,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:32,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:28:32,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:28:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:33,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061278997] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:28:33,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:28:33,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:28:33,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552939873] [2022-02-11 01:28:33,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:28:33,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:28:33,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:28:33,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:28:33,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:28:33,540 INFO L87 Difference]: Start difference. First operand 2249 states and 7954 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-02-11 01:28:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:28:36,882 INFO L93 Difference]: Finished difference Result 4792 states and 15350 transitions. [2022-02-11 01:28:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:28:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 26 [2022-02-11 01:28:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:28:36,890 INFO L225 Difference]: With dead ends: 4792 [2022-02-11 01:28:36,891 INFO L226 Difference]: Without dead ends: 4747 [2022-02-11 01:28:36,891 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=912, Invalid=3644, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:28:36,893 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 551 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:28:36,893 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 342 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:28:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-02-11 01:28:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 2277. [2022-02-11 01:28:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 3.5342706502636205) internal successors, (8044), 2276 states have internal predecessors, (8044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 8044 transitions. [2022-02-11 01:28:36,939 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 8044 transitions. Word has length 26 [2022-02-11 01:28:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:28:36,939 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 8044 transitions. [2022-02-11 01:28:36,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-02-11 01:28:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 8044 transitions. [2022-02-11 01:28:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:28:36,942 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:28:36,942 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:28:36,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 01:28:37,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-11 01:28:37,158 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:28:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:28:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 8 times [2022-02-11 01:28:37,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:28:37,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936984697] [2022-02-11 01:28:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:28:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:28:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:37,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:28:37,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936984697] [2022-02-11 01:28:37,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936984697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:28:37,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062014268] [2022-02-11 01:28:37,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:28:37,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:28:37,534 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) [2022-02-11 01:28:37,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 01:28:37,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:28:37,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:28:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:28:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:28:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:38,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:28:38,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 109 [2022-02-11 01:28:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:38,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:28:39,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:39,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:39,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:28:39,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-02-11 01:28:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:39,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062014268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:28:39,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:28:39,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 01:28:39,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544604208] [2022-02-11 01:28:39,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:28:39,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:28:39,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:28:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:28:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:28:39,970 INFO L87 Difference]: Start difference. First operand 2277 states and 8044 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:28:50,880 INFO L93 Difference]: Finished difference Result 5580 states and 17964 transitions. [2022-02-11 01:28:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-11 01:28:50,880 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:28:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:28:50,890 INFO L225 Difference]: With dead ends: 5580 [2022-02-11 01:28:50,890 INFO L226 Difference]: Without dead ends: 5535 [2022-02-11 01:28:50,891 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5077 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2249, Invalid=11557, Unknown=0, NotChecked=0, Total=13806 [2022-02-11 01:28:50,891 INFO L934 BasicCegarLoop]: 56 mSDtfsCounter, 702 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:28:50,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 839 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2380 Invalid, 0 Unknown, 577 Unchecked, 1.4s Time] [2022-02-11 01:28:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-02-11 01:28:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 2346. [2022-02-11 01:28:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 3.537313432835821) internal successors, (8295), 2345 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 8295 transitions. [2022-02-11 01:28:50,950 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 8295 transitions. Word has length 26 [2022-02-11 01:28:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:28:50,950 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 8295 transitions. [2022-02-11 01:28:50,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 8295 transitions. [2022-02-11 01:28:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:28:50,954 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:28:50,954 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:28:50,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 01:28:51,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-11 01:28:51,169 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:28:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:28:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1377789112, now seen corresponding path program 9 times [2022-02-11 01:28:51,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:28:51,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974369462] [2022-02-11 01:28:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:28:51,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:28:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:51,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:28:51,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974369462] [2022-02-11 01:28:51,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974369462] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:28:51,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379915140] [2022-02-11 01:28:51,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:28:51,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:51,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:28:51,550 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) [2022-02-11 01:28:51,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 01:28:51,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:28:51,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:28:51,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:28:51,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:28:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:51,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:51,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:28:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:52,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:28:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:28:52,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:28:52,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:28:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:53,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379915140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:28:53,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:28:53,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:28:53,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394921525] [2022-02-11 01:28:53,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:28:53,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:28:53,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:28:53,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:28:53,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:28:53,334 INFO L87 Difference]: Start difference. First operand 2346 states and 8295 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:28:57,468 INFO L93 Difference]: Finished difference Result 4913 states and 15799 transitions. [2022-02-11 01:28:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:28:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:28:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:28:57,477 INFO L225 Difference]: With dead ends: 4913 [2022-02-11 01:28:57,477 INFO L226 Difference]: Without dead ends: 4891 [2022-02-11 01:28:57,479 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=963, Invalid=4149, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:28:57,481 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 451 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:28:57,482 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 421 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1654 Invalid, 0 Unknown, 55 Unchecked, 0.9s Time] [2022-02-11 01:28:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2022-02-11 01:28:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 2334. [2022-02-11 01:28:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.5452207458208314) internal successors, (8271), 2333 states have internal predecessors, (8271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 8271 transitions. [2022-02-11 01:28:57,564 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 8271 transitions. Word has length 26 [2022-02-11 01:28:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:28:57,564 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 8271 transitions. [2022-02-11 01:28:57,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:28:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 8271 transitions. [2022-02-11 01:28:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:28:57,569 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:28:57,569 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:28:57,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 01:28:57,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-11 01:28:57,785 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:28:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:28:57,785 INFO L85 PathProgramCache]: Analyzing trace with hash -116118610, now seen corresponding path program 10 times [2022-02-11 01:28:57,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:28:57,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384671945] [2022-02-11 01:28:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:28:57,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:28:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:28:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:58,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:28:58,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384671945] [2022-02-11 01:28:58,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384671945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:28:58,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023584876] [2022-02-11 01:28:58,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:28:58,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:28:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:28:58,304 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) [2022-02-11 01:28:58,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 01:28:58,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:28:58,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:28:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:28:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:28:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:28:58,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:28:58,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:28:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:28:59,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:28:59,699 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:28:59,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:29:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:01,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023584876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:29:01,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:29:01,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:29:01,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664324283] [2022-02-11 01:29:01,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:29:01,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:29:01,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:29:01,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:29:01,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:29:01,036 INFO L87 Difference]: Start difference. First operand 2334 states and 8271 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:29:06,701 INFO L93 Difference]: Finished difference Result 4804 states and 15568 transitions. [2022-02-11 01:29:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 01:29:06,702 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:29:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:29:06,710 INFO L225 Difference]: With dead ends: 4804 [2022-02-11 01:29:06,710 INFO L226 Difference]: Without dead ends: 4767 [2022-02-11 01:29:06,710 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2309 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1007, Invalid=6475, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 01:29:06,711 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 379 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:29:06,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 492 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:29:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2022-02-11 01:29:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 2321. [2022-02-11 01:29:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 3.548706896551724) internal successors, (8233), 2320 states have internal predecessors, (8233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 8233 transitions. [2022-02-11 01:29:06,759 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 8233 transitions. Word has length 26 [2022-02-11 01:29:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:29:06,759 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 8233 transitions. [2022-02-11 01:29:06,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 8233 transitions. [2022-02-11 01:29:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:29:06,763 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:29:06,763 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:29:06,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 01:29:06,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:29:06,979 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:29:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:29:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 11 times [2022-02-11 01:29:06,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:29:06,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074913694] [2022-02-11 01:29:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:29:06,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:29:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:29:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:07,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:29:07,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074913694] [2022-02-11 01:29:07,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074913694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:29:07,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918183217] [2022-02-11 01:29:07,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:29:07,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:29:07,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:29:07,213 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) [2022-02-11 01:29:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 01:29:07,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:29:07,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:29:07,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:29:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:29:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:29:07,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:07,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:29:07,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 01:29:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:07,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:29:08,374 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:29:08,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:29:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:09,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918183217] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:29:09,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:29:09,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:29:09,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608459900] [2022-02-11 01:29:09,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:29:09,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:29:09,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:29:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:29:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:29:09,544 INFO L87 Difference]: Start difference. First operand 2321 states and 8233 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:29:16,007 INFO L93 Difference]: Finished difference Result 5403 states and 17456 transitions. [2022-02-11 01:29:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-11 01:29:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:29:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:29:16,017 INFO L225 Difference]: With dead ends: 5403 [2022-02-11 01:29:16,017 INFO L226 Difference]: Without dead ends: 5316 [2022-02-11 01:29:16,018 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1663, Invalid=10547, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:29:16,018 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 545 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:29:16,018 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 566 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:29:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-02-11 01:29:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2361. [2022-02-11 01:29:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.548305084745763) internal successors, (8374), 2360 states have internal predecessors, (8374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8374 transitions. [2022-02-11 01:29:16,078 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8374 transitions. Word has length 26 [2022-02-11 01:29:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:29:16,078 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8374 transitions. [2022-02-11 01:29:16,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8374 transitions. [2022-02-11 01:29:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:29:16,082 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:29:16,082 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:29:16,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-11 01:29:16,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 01:29:16,298 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:29:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:29:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash 338936652, now seen corresponding path program 37 times [2022-02-11 01:29:16,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:29:16,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271302208] [2022-02-11 01:29:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:29:16,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:29:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:29:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:16,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:29:16,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271302208] [2022-02-11 01:29:16,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271302208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:29:16,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080858614] [2022-02-11 01:29:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:29:16,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:29:16,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:29:16,566 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) [2022-02-11 01:29:16,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 01:29:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:29:16,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:29:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:29:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:29:17,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:29:17,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:17,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:17,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:29:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:17,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:29:17,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:17,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:17,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:17,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:29:17,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-02-11 01:29:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:18,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080858614] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:29:18,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:29:18,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 01:29:18,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868387543] [2022-02-11 01:29:18,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:29:18,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:29:18,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:29:18,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:29:18,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:29:18,130 INFO L87 Difference]: Start difference. First operand 2361 states and 8374 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:29:23,728 INFO L93 Difference]: Finished difference Result 6053 states and 19484 transitions. [2022-02-11 01:29:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 01:29:23,729 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:29:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:29:23,740 INFO L225 Difference]: With dead ends: 6053 [2022-02-11 01:29:23,741 INFO L226 Difference]: Without dead ends: 5972 [2022-02-11 01:29:23,741 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1822, Invalid=8278, Unknown=0, NotChecked=0, Total=10100 [2022-02-11 01:29:23,742 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 600 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:29:23,742 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 534 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:29:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2022-02-11 01:29:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 2450. [2022-02-11 01:29:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2449 states have (on average 3.5728868926092283) internal successors, (8750), 2449 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 8750 transitions. [2022-02-11 01:29:23,811 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 8750 transitions. Word has length 26 [2022-02-11 01:29:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:29:23,811 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 8750 transitions. [2022-02-11 01:29:23,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 8750 transitions. [2022-02-11 01:29:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:29:23,815 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:29:23,815 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:29:23,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 01:29:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:29:24,017 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:29:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:29:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1541249020, now seen corresponding path program 38 times [2022-02-11 01:29:24,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:29:24,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411454733] [2022-02-11 01:29:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:29:24,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:29:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:29:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:24,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:29:24,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411454733] [2022-02-11 01:29:24,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411454733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:29:24,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779834206] [2022-02-11 01:29:24,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:29:24,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:29:24,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:29:24,339 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) [2022-02-11 01:29:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 01:29:24,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:29:24,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:29:24,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:29:24,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:29:24,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:29:24,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 115 [2022-02-11 01:29:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:27,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:29:28,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:28,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:28,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:29:28,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-02-11 01:29:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:28,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779834206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:29:28,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:29:28,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-02-11 01:29:28,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825701424] [2022-02-11 01:29:28,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:29:28,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:29:28,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:29:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:29:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:29:28,631 INFO L87 Difference]: Start difference. First operand 2450 states and 8750 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:29:48,942 INFO L93 Difference]: Finished difference Result 10188 states and 33160 transitions. [2022-02-11 01:29:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-02-11 01:29:48,942 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:29:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:29:48,963 INFO L225 Difference]: With dead ends: 10188 [2022-02-11 01:29:48,963 INFO L226 Difference]: Without dead ends: 10102 [2022-02-11 01:29:48,965 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28138 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=8934, Invalid=54318, Unknown=0, NotChecked=0, Total=63252 [2022-02-11 01:29:48,966 INFO L934 BasicCegarLoop]: 62 mSDtfsCounter, 1054 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 6178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3382 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:29:48,966 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1039 Invalid, 6178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2633 Invalid, 0 Unknown, 3382 Unchecked, 1.5s Time] [2022-02-11 01:29:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10102 states. [2022-02-11 01:29:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10102 to 2531. [2022-02-11 01:29:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 3.6039525691699605) internal successors, (9118), 2530 states have internal predecessors, (9118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 9118 transitions. [2022-02-11 01:29:49,062 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 9118 transitions. Word has length 26 [2022-02-11 01:29:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:29:49,062 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 9118 transitions. [2022-02-11 01:29:49,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:29:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 9118 transitions. [2022-02-11 01:29:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:29:49,067 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:29:49,067 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:29:49,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 01:29:49,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-11 01:29:49,279 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:29:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:29:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -353117544, now seen corresponding path program 39 times [2022-02-11 01:29:49,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:29:49,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808812791] [2022-02-11 01:29:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:29:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:29:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:29:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:49,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:29:49,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808812791] [2022-02-11 01:29:49,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808812791] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:29:49,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883312342] [2022-02-11 01:29:49,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:29:49,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:29:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:29:49,462 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) [2022-02-11 01:29:49,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:29:49,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:29:49,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 01:29:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:29:49,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:29:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:29:49,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:29:49,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:29:49,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-02-11 01:29:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:50,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:29:51,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:51,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:29:51,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:29:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:29:51,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 86 [2022-02-11 01:29:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:29:51,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883312342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:29:51,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:29:51,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-02-11 01:29:51,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573548712] [2022-02-11 01:29:51,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:29:51,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:29:51,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:29:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 01:29:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:29:51,257 INFO L87 Difference]: Start difference. First operand 2531 states and 9118 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:30:14,916 INFO L93 Difference]: Finished difference Result 9106 states and 28908 transitions. [2022-02-11 01:30:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-02-11 01:30:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:30:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:30:14,934 INFO L225 Difference]: With dead ends: 9106 [2022-02-11 01:30:14,934 INFO L226 Difference]: Without dead ends: 9039 [2022-02-11 01:30:14,936 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23351 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=11129, Invalid=41083, Unknown=0, NotChecked=0, Total=52212 [2022-02-11 01:30:14,937 INFO L934 BasicCegarLoop]: 69 mSDtfsCounter, 1250 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 4476 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 4476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:30:14,937 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 1133 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 4476 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-11 01:30:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2022-02-11 01:30:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 2626. [2022-02-11 01:30:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 3.6365714285714286) internal successors, (9546), 2625 states have internal predecessors, (9546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 9546 transitions. [2022-02-11 01:30:15,052 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 9546 transitions. Word has length 26 [2022-02-11 01:30:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:30:15,053 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 9546 transitions. [2022-02-11 01:30:15,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 9546 transitions. [2022-02-11 01:30:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:30:15,056 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:30:15,056 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:30:15,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 01:30:15,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-11 01:30:15,272 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:30:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:30:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1122519044, now seen corresponding path program 12 times [2022-02-11 01:30:15,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:30:15,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217833883] [2022-02-11 01:30:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:30:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:30:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:30:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:15,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:30:15,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217833883] [2022-02-11 01:30:15,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217833883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:30:15,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99962015] [2022-02-11 01:30:15,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:30:15,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:15,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:30:15,595 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) [2022-02-11 01:30:15,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:30:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:30:15,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 01:30:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:30:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:30:16,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:30:16,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:30:16,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:30:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:16,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:30:16,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:30:16,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:16,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:30:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:19,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99962015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:30:19,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:30:19,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:30:19,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178420589] [2022-02-11 01:30:19,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:30:19,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:30:19,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:30:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:30:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:30:19,432 INFO L87 Difference]: Start difference. First operand 2626 states and 9546 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-02-11 01:30:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:30:21,932 INFO L93 Difference]: Finished difference Result 4913 states and 16279 transitions. [2022-02-11 01:30:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:30:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 26 [2022-02-11 01:30:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:30:21,942 INFO L225 Difference]: With dead ends: 4913 [2022-02-11 01:30:21,942 INFO L226 Difference]: Without dead ends: 4835 [2022-02-11 01:30:21,943 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=664, Invalid=3242, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 01:30:21,943 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 394 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:30:21,943 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 344 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:30:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-02-11 01:30:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 2703. [2022-02-11 01:30:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 3.626943005181347) internal successors, (9800), 2702 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 9800 transitions. [2022-02-11 01:30:22,004 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 9800 transitions. Word has length 26 [2022-02-11 01:30:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:30:22,004 INFO L470 AbstractCegarLoop]: Abstraction has 2703 states and 9800 transitions. [2022-02-11 01:30:22,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-02-11 01:30:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 9800 transitions. [2022-02-11 01:30:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:30:22,008 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:30:22,008 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:30:22,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 01:30:22,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:22,224 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:30:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:30:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1990419930, now seen corresponding path program 13 times [2022-02-11 01:30:22,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:30:22,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992230062] [2022-02-11 01:30:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:30:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:30:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:30:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:22,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:30:22,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992230062] [2022-02-11 01:30:22,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992230062] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:30:22,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479906206] [2022-02-11 01:30:22,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:30:22,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:22,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:30:22,497 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) [2022-02-11 01:30:22,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 01:30:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:30:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:30:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:30:22,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:30:22,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:22,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:30:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:23,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:30:23,562 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:30:23,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:30:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:25,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479906206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:30:25,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:30:25,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:30:25,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085522258] [2022-02-11 01:30:25,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:30:25,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:30:25,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:30:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:30:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:30:25,393 INFO L87 Difference]: Start difference. First operand 2703 states and 9800 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:30:30,060 INFO L93 Difference]: Finished difference Result 5160 states and 17193 transitions. [2022-02-11 01:30:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 01:30:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:30:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:30:30,070 INFO L225 Difference]: With dead ends: 5160 [2022-02-11 01:30:30,070 INFO L226 Difference]: Without dead ends: 5115 [2022-02-11 01:30:30,071 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=838, Invalid=5482, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:30:30,071 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 331 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:30:30,071 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 451 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:30:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2022-02-11 01:30:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 2687. [2022-02-11 01:30:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 3.632911392405063) internal successors, (9758), 2686 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 9758 transitions. [2022-02-11 01:30:30,128 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 9758 transitions. Word has length 26 [2022-02-11 01:30:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:30:30,128 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 9758 transitions. [2022-02-11 01:30:30,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:30,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 9758 transitions. [2022-02-11 01:30:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:30:30,132 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:30:30,132 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:30:30,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-11 01:30:30,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-11 01:30:30,339 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:30:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:30:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1451678616, now seen corresponding path program 14 times [2022-02-11 01:30:30,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:30:30,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878738019] [2022-02-11 01:30:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:30:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:30:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:30:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:30,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:30:30,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878738019] [2022-02-11 01:30:30,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878738019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:30:30,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942816721] [2022-02-11 01:30:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:30:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:30,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:30:30,547 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) [2022-02-11 01:30:30,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 01:30:30,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:30:30,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:30:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:30:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:30:31,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:31,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 99 [2022-02-11 01:30:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:30:32,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:32,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-02-11 01:30:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:35,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942816721] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:30:35,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:30:35,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-02-11 01:30:35,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412446673] [2022-02-11 01:30:35,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:30:35,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:30:35,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:30:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:30:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:30:35,758 INFO L87 Difference]: Start difference. First operand 2687 states and 9758 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:30:37,587 INFO L93 Difference]: Finished difference Result 5325 states and 19041 transitions. [2022-02-11 01:30:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 01:30:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:30:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:30:37,599 INFO L225 Difference]: With dead ends: 5325 [2022-02-11 01:30:37,599 INFO L226 Difference]: Without dead ends: 5310 [2022-02-11 01:30:37,599 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 01:30:37,599 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 366 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:30:37,599 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 282 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 733 Invalid, 0 Unknown, 711 Unchecked, 0.4s Time] [2022-02-11 01:30:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2022-02-11 01:30:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 2699. [2022-02-11 01:30:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 3.6345441067457376) internal successors, (9806), 2698 states have internal predecessors, (9806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 9806 transitions. [2022-02-11 01:30:37,661 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 9806 transitions. Word has length 26 [2022-02-11 01:30:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:30:37,661 INFO L470 AbstractCegarLoop]: Abstraction has 2699 states and 9806 transitions. [2022-02-11 01:30:37,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 9806 transitions. [2022-02-11 01:30:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:30:37,665 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:30:37,665 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:30:37,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 01:30:37,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-11 01:30:37,881 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:30:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:30:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1057572634, now seen corresponding path program 15 times [2022-02-11 01:30:37,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:30:37,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543459789] [2022-02-11 01:30:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:30:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:30:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:30:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:38,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:30:38,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543459789] [2022-02-11 01:30:38,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543459789] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:30:38,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469585845] [2022-02-11 01:30:38,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:30:38,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:38,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:30:38,115 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) [2022-02-11 01:30:38,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 01:30:38,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:30:38,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:30:38,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:30:38,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:30:38,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:30:38,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:38,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:30:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:38,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:30:39,110 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:30:39,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:30:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:39,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469585845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:30:39,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:30:39,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:30:39,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25515444] [2022-02-11 01:30:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:30:39,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:30:39,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:30:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:30:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:30:39,819 INFO L87 Difference]: Start difference. First operand 2699 states and 9806 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:45,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:30:45,415 INFO L93 Difference]: Finished difference Result 6053 states and 20100 transitions. [2022-02-11 01:30:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:30:45,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:30:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:30:45,428 INFO L225 Difference]: With dead ends: 6053 [2022-02-11 01:30:45,428 INFO L226 Difference]: Without dead ends: 6002 [2022-02-11 01:30:45,429 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3202 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1377, Invalid=8325, Unknown=0, NotChecked=0, Total=9702 [2022-02-11 01:30:45,429 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 432 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:30:45,429 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 512 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:30:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2022-02-11 01:30:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 2697. [2022-02-11 01:30:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2696 states have (on average 3.6353857566765577) internal successors, (9801), 2696 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 9801 transitions. [2022-02-11 01:30:45,499 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 9801 transitions. Word has length 26 [2022-02-11 01:30:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:30:45,501 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 9801 transitions. [2022-02-11 01:30:45,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 9801 transitions. [2022-02-11 01:30:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:30:45,505 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:30:45,505 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:30:45,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 01:30:45,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:45,721 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:30:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:30:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 16 times [2022-02-11 01:30:45,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:30:45,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56263417] [2022-02-11 01:30:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:30:45,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:30:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:30:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:45,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:30:45,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56263417] [2022-02-11 01:30:45,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56263417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:30:45,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645797035] [2022-02-11 01:30:45,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:30:45,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:45,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:30:45,893 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) [2022-02-11 01:30:45,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 01:30:45,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:30:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:30:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:30:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:30:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:30:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:30:46,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:30:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:46,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:30:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:30:47,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:47,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-02-11 01:30:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:48,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645797035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:30:48,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:30:48,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:30:48,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473201235] [2022-02-11 01:30:48,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:30:48,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:30:48,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:30:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:30:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:30:48,564 INFO L87 Difference]: Start difference. First operand 2697 states and 9801 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) [2022-02-11 01:30:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:30:51,542 INFO L93 Difference]: Finished difference Result 5180 states and 17050 transitions. [2022-02-11 01:30:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:30:51,542 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 26 [2022-02-11 01:30:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:30:51,552 INFO L225 Difference]: With dead ends: 5180 [2022-02-11 01:30:51,552 INFO L226 Difference]: Without dead ends: 5052 [2022-02-11 01:30:51,552 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=658, Invalid=3002, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:30:51,552 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 312 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:30:51,553 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 394 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:30:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2022-02-11 01:30:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 2791. [2022-02-11 01:30:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.6236559139784945) internal successors, (10110), 2790 states have internal predecessors, (10110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:30:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10110 transitions. [2022-02-11 01:30:51,611 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10110 transitions. Word has length 26 [2022-02-11 01:30:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:30:51,611 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 10110 transitions. [2022-02-11 01:30:51,612 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) [2022-02-11 01:30:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10110 transitions. [2022-02-11 01:30:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:30:51,616 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:30:51,616 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:30:51,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 01:30:51,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:51,817 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:30:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:30:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 17 times [2022-02-11 01:30:51,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:30:51,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717907446] [2022-02-11 01:30:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:30:51,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:30:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:30:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:51,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:30:51,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717907446] [2022-02-11 01:30:51,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717907446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:30:51,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711203447] [2022-02-11 01:30:51,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:30:51,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:30:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:30:51,998 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:30:51,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 01:30:52,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:30:52,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:30:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:30:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:30:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:30:52,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:52,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:30:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:52,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:30:52,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:30:52,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:30:52,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-02-11 01:30:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:30:54,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711203447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:30:54,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:30:54,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:30:54,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659057859] [2022-02-11 01:30:54,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:30:54,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:30:54,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:30:54,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:30:54,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:30:54,434 INFO L87 Difference]: Start difference. First operand 2791 states and 10110 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) [2022-02-11 01:31:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:05,689 INFO L93 Difference]: Finished difference Result 7464 states and 23779 transitions. [2022-02-11 01:31:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-11 01:31:05,689 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 26 [2022-02-11 01:31:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:05,704 INFO L225 Difference]: With dead ends: 7464 [2022-02-11 01:31:05,704 INFO L226 Difference]: Without dead ends: 7289 [2022-02-11 01:31:05,705 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5210 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2262, Invalid=12018, Unknown=0, NotChecked=0, Total=14280 [2022-02-11 01:31:05,706 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 575 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:05,706 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 629 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:31:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2022-02-11 01:31:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 2946. [2022-02-11 01:31:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 3.636672325976231) internal successors, (10710), 2945 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 10710 transitions. [2022-02-11 01:31:05,798 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 10710 transitions. Word has length 26 [2022-02-11 01:31:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:05,798 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 10710 transitions. [2022-02-11 01:31:05,798 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) [2022-02-11 01:31:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 10710 transitions. [2022-02-11 01:31:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:05,802 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:05,802 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:05,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 01:31:06,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:06,010 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 18 times [2022-02-11 01:31:06,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:06,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600781866] [2022-02-11 01:31:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:06,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:06,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:06,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600781866] [2022-02-11 01:31:06,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600781866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:06,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039880241] [2022-02-11 01:31:06,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:31:06,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:06,408 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) [2022-02-11 01:31:06,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 01:31:06,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:31:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:31:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:31:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:06,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:06,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:06,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:31:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:07,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:07,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:07,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-02-11 01:31:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:12,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039880241] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:12,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:12,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-11 01:31:12,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138379387] [2022-02-11 01:31:12,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:12,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:31:12,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:31:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:31:12,651 INFO L87 Difference]: Start difference. First operand 2946 states and 10710 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:15,806 INFO L93 Difference]: Finished difference Result 5431 states and 18218 transitions. [2022-02-11 01:31:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 01:31:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:31:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:15,817 INFO L225 Difference]: With dead ends: 5431 [2022-02-11 01:31:15,818 INFO L226 Difference]: Without dead ends: 5340 [2022-02-11 01:31:15,818 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=767, Invalid=3925, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:31:15,818 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 387 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:15,819 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 417 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1404 Invalid, 0 Unknown, 174 Unchecked, 0.7s Time] [2022-02-11 01:31:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2022-02-11 01:31:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 2971. [2022-02-11 01:31:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 3.641077441077441) internal successors, (10814), 2970 states have internal predecessors, (10814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 10814 transitions. [2022-02-11 01:31:15,884 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 10814 transitions. Word has length 26 [2022-02-11 01:31:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:15,884 INFO L470 AbstractCegarLoop]: Abstraction has 2971 states and 10814 transitions. [2022-02-11 01:31:15,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 10814 transitions. [2022-02-11 01:31:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:15,889 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:15,889 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:15,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 01:31:16,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 01:31:16,104 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash 237410036, now seen corresponding path program 19 times [2022-02-11 01:31:16,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:16,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91735916] [2022-02-11 01:31:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:16,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:16,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91735916] [2022-02-11 01:31:16,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91735916] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:16,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777441931] [2022-02-11 01:31:16,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:31:16,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:16,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:16,380 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) [2022-02-11 01:31:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:16,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 01:31:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:31:16,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:16,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:16,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:31:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:16,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:17,231 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:31:17,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-02-11 01:31:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:18,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777441931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:18,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:18,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 01:31:18,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763611350] [2022-02-11 01:31:18,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:18,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:31:18,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:18,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:31:18,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:31:18,846 INFO L87 Difference]: Start difference. First operand 2971 states and 10814 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-02-11 01:31:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:20,980 INFO L93 Difference]: Finished difference Result 4946 states and 16708 transitions. [2022-02-11 01:31:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:31:20,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 26 [2022-02-11 01:31:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:20,990 INFO L225 Difference]: With dead ends: 4946 [2022-02-11 01:31:20,991 INFO L226 Difference]: Without dead ends: 4916 [2022-02-11 01:31:20,991 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:31:20,991 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 194 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:20,991 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 262 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 865 Invalid, 0 Unknown, 299 Unchecked, 0.5s Time] [2022-02-11 01:31:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2022-02-11 01:31:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 2980. [2022-02-11 01:31:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.6411547499160792) internal successors, (10847), 2979 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 10847 transitions. [2022-02-11 01:31:21,093 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 10847 transitions. Word has length 26 [2022-02-11 01:31:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:21,093 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 10847 transitions. [2022-02-11 01:31:21,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-02-11 01:31:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 10847 transitions. [2022-02-11 01:31:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:21,098 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:21,098 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:21,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 01:31:21,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-02-11 01:31:21,311 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1355581052, now seen corresponding path program 20 times [2022-02-11 01:31:21,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:21,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25911969] [2022-02-11 01:31:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:21,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:21,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25911969] [2022-02-11 01:31:21,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25911969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:21,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874601960] [2022-02-11 01:31:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:31:21,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:21,512 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:31:21,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 01:31:21,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:31:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:31:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:31:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:22,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:22,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:22,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:22,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 85 [2022-02-11 01:31:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:22,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:22,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:22,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:22,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 161 [2022-02-11 01:31:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:24,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874601960] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:24,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:24,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:31:24,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548423049] [2022-02-11 01:31:24,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:24,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:31:24,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:31:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:31:24,442 INFO L87 Difference]: Start difference. First operand 2980 states and 10847 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) [2022-02-11 01:31:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:27,574 INFO L93 Difference]: Finished difference Result 5798 states and 19244 transitions. [2022-02-11 01:31:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:31:27,574 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 26 [2022-02-11 01:31:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:27,585 INFO L225 Difference]: With dead ends: 5798 [2022-02-11 01:31:27,585 INFO L226 Difference]: Without dead ends: 5705 [2022-02-11 01:31:27,586 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=805, Invalid=3485, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:31:27,586 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 338 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:27,586 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 351 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1228 Invalid, 0 Unknown, 37 Unchecked, 0.6s Time] [2022-02-11 01:31:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2022-02-11 01:31:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 2997. [2022-02-11 01:31:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 3.6398531375166887) internal successors, (10905), 2996 states have internal predecessors, (10905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 10905 transitions. [2022-02-11 01:31:27,649 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 10905 transitions. Word has length 26 [2022-02-11 01:31:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:27,650 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 10905 transitions. [2022-02-11 01:31:27,650 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) [2022-02-11 01:31:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 10905 transitions. [2022-02-11 01:31:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:27,654 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:27,654 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:27,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-11 01:31:27,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-11 01:31:27,870 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 21 times [2022-02-11 01:31:27,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:27,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809383885] [2022-02-11 01:31:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:27,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:28,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:28,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809383885] [2022-02-11 01:31:28,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809383885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:28,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503845140] [2022-02-11 01:31:28,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:31:28,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:28,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:28,224 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) [2022-02-11 01:31:28,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 01:31:28,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:31:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:31:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:31:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:28,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:28,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:31:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:28,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:29,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:29,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:29,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-02-11 01:31:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:30,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503845140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:30,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:30,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:31:30,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097165978] [2022-02-11 01:31:30,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:30,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:31:30,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:31:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:31:30,874 INFO L87 Difference]: Start difference. First operand 2997 states and 10905 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:33,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:33,230 INFO L93 Difference]: Finished difference Result 5382 states and 18047 transitions. [2022-02-11 01:31:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:31:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:31:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:33,240 INFO L225 Difference]: With dead ends: 5382 [2022-02-11 01:31:33,240 INFO L226 Difference]: Without dead ends: 5324 [2022-02-11 01:31:33,240 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=768, Invalid=3392, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 01:31:33,242 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 412 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:33,243 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 330 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 852 Invalid, 0 Unknown, 330 Unchecked, 0.4s Time] [2022-02-11 01:31:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2022-02-11 01:31:33,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 3055. [2022-02-11 01:31:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3055 states, 3054 states have (on average 3.6345776031434185) internal successors, (11100), 3054 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 11100 transitions. [2022-02-11 01:31:33,321 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 11100 transitions. Word has length 26 [2022-02-11 01:31:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:33,322 INFO L470 AbstractCegarLoop]: Abstraction has 3055 states and 11100 transitions. [2022-02-11 01:31:33,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 11100 transitions. [2022-02-11 01:31:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:33,326 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:33,326 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:33,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-11 01:31:33,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:33,537 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -697050812, now seen corresponding path program 22 times [2022-02-11 01:31:33,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:33,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547582241] [2022-02-11 01:31:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:33,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:33,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547582241] [2022-02-11 01:31:33,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547582241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:33,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80206236] [2022-02-11 01:31:33,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:31:33,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:33,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:33,733 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) [2022-02-11 01:31:33,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 01:31:33,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:31:33,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:31:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:31:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:34,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:34,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:31:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:34,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:34,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:34,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:34,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-02-11 01:31:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:36,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80206236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:36,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:36,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:31:36,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910765665] [2022-02-11 01:31:36,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:36,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:31:36,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:31:36,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:31:36,178 INFO L87 Difference]: Start difference. First operand 3055 states and 11100 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) [2022-02-11 01:31:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:39,180 INFO L93 Difference]: Finished difference Result 5939 states and 19853 transitions. [2022-02-11 01:31:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 01:31:39,181 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 26 [2022-02-11 01:31:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:39,193 INFO L225 Difference]: With dead ends: 5939 [2022-02-11 01:31:39,193 INFO L226 Difference]: Without dead ends: 5895 [2022-02-11 01:31:39,194 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:31:39,194 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 455 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:39,195 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 320 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 963 Invalid, 0 Unknown, 367 Unchecked, 0.5s Time] [2022-02-11 01:31:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-02-11 01:31:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 3081. [2022-02-11 01:31:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.639935064935065) internal successors, (11211), 3080 states have internal predecessors, (11211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 11211 transitions. [2022-02-11 01:31:39,267 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 11211 transitions. Word has length 26 [2022-02-11 01:31:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:39,267 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 11211 transitions. [2022-02-11 01:31:39,267 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) [2022-02-11 01:31:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 11211 transitions. [2022-02-11 01:31:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:39,272 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:39,272 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:39,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 01:31:39,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:39,488 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 23 times [2022-02-11 01:31:39,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:39,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251351165] [2022-02-11 01:31:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:39,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:39,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251351165] [2022-02-11 01:31:39,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251351165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:39,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656524618] [2022-02-11 01:31:39,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:31:39,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:39,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:39,680 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) [2022-02-11 01:31:39,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 01:31:39,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:31:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:31:39,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:31:39,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:40,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:40,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:40,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:31:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:40,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:40,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:40,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:40,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 203 treesize of output 165 [2022-02-11 01:31:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:42,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656524618] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:42,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:42,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:31:42,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968424047] [2022-02-11 01:31:42,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:42,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:31:42,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:31:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:31:42,399 INFO L87 Difference]: Start difference. First operand 3081 states and 11211 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) [2022-02-11 01:31:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:48,306 INFO L93 Difference]: Finished difference Result 5840 states and 19590 transitions. [2022-02-11 01:31:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 01:31:48,307 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 26 [2022-02-11 01:31:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:48,317 INFO L225 Difference]: With dead ends: 5840 [2022-02-11 01:31:48,317 INFO L226 Difference]: Without dead ends: 5758 [2022-02-11 01:31:48,318 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1136, Invalid=5836, Unknown=0, NotChecked=0, Total=6972 [2022-02-11 01:31:48,318 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 461 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:48,318 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 299 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1061 Invalid, 0 Unknown, 129 Unchecked, 0.7s Time] [2022-02-11 01:31:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2022-02-11 01:31:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 3146. [2022-02-11 01:31:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3145 states have (on average 3.638473767885533) internal successors, (11443), 3145 states have internal predecessors, (11443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 11443 transitions. [2022-02-11 01:31:48,380 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 11443 transitions. Word has length 26 [2022-02-11 01:31:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:48,381 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 11443 transitions. [2022-02-11 01:31:48,381 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) [2022-02-11 01:31:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 11443 transitions. [2022-02-11 01:31:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:48,385 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:48,385 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:48,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-11 01:31:48,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 01:31:48,591 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1440358446, now seen corresponding path program 24 times [2022-02-11 01:31:48,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:48,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696659566] [2022-02-11 01:31:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:48,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:48,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696659566] [2022-02-11 01:31:48,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696659566] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:48,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335449457] [2022-02-11 01:31:48,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:31:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:48,818 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) [2022-02-11 01:31:48,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 01:31:48,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:31:48,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:31:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:31:48,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:49,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:49,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:31:49,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:31:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:49,921 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:31:49,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 157 [2022-02-11 01:31:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:51,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335449457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:51,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:51,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:31:51,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701881994] [2022-02-11 01:31:51,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:51,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:31:51,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:31:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:31:51,531 INFO L87 Difference]: Start difference. First operand 3146 states and 11443 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:55,374 INFO L93 Difference]: Finished difference Result 6413 states and 21358 transitions. [2022-02-11 01:31:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:31:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:31:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:55,407 INFO L225 Difference]: With dead ends: 6413 [2022-02-11 01:31:55,407 INFO L226 Difference]: Without dead ends: 6342 [2022-02-11 01:31:55,407 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1042, Invalid=5438, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 01:31:55,407 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 467 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:55,407 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 384 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:31:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-02-11 01:31:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 3169. [2022-02-11 01:31:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 3.63510101010101) internal successors, (11516), 3168 states have internal predecessors, (11516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 11516 transitions. [2022-02-11 01:31:55,512 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 11516 transitions. Word has length 26 [2022-02-11 01:31:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:55,512 INFO L470 AbstractCegarLoop]: Abstraction has 3169 states and 11516 transitions. [2022-02-11 01:31:55,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 11516 transitions. [2022-02-11 01:31:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:55,532 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:55,532 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:55,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-11 01:31:55,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-11 01:31:55,749 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:31:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:31:55,749 INFO L85 PathProgramCache]: Analyzing trace with hash 457853170, now seen corresponding path program 40 times [2022-02-11 01:31:55,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:31:55,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465417818] [2022-02-11 01:31:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:31:55,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:31:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:31:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:55,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:31:55,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465417818] [2022-02-11 01:31:55,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465417818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:31:55,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767545420] [2022-02-11 01:31:55,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:31:55,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:31:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:31:55,968 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) [2022-02-11 01:31:56,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:31:56,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:31:56,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 01:31:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:31:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:31:56,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:56,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:31:56,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:56,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:31:56,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:31:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:56,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:31:56,895 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:31:56,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-02-11 01:31:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:31:57,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767545420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:31:57,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:31:57,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-11 01:31:57,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749924337] [2022-02-11 01:31:57,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:31:57,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:31:57,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:31:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:31:57,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:31:57,262 INFO L87 Difference]: Start difference. First operand 3169 states and 11516 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:31:59,717 INFO L93 Difference]: Finished difference Result 5026 states and 17247 transitions. [2022-02-11 01:31:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:31:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:31:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:31:59,727 INFO L225 Difference]: With dead ends: 5026 [2022-02-11 01:31:59,728 INFO L226 Difference]: Without dead ends: 4925 [2022-02-11 01:31:59,728 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=705, Invalid=3987, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:31:59,728 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 315 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:31:59,728 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 311 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:31:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2022-02-11 01:31:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 3223. [2022-02-11 01:31:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3222 states have (on average 3.6204220980757293) internal successors, (11665), 3222 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 11665 transitions. [2022-02-11 01:31:59,791 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 11665 transitions. Word has length 26 [2022-02-11 01:31:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:31:59,791 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 11665 transitions. [2022-02-11 01:31:59,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:31:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 11665 transitions. [2022-02-11 01:31:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:31:59,797 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:31:59,797 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:31:59,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-11 01:32:00,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:00,013 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:32:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:32:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 41 times [2022-02-11 01:32:00,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:32:00,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611419709] [2022-02-11 01:32:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:32:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:32:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:00,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:32:00,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611419709] [2022-02-11 01:32:00,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611419709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:32:00,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601737142] [2022-02-11 01:32:00,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:32:00,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:00,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:32:00,300 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) [2022-02-11 01:32:00,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:32:00,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:32:00,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 01:32:00,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:32:00,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:32:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:32:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:32:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:00,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-02-11 01:32:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:00,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:32:01,153 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:32:01,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:32:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:01,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601737142] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:32:01,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:32:01,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-11 01:32:01,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502113429] [2022-02-11 01:32:01,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:32:01,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:32:01,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:32:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:32:01,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:32:01,583 INFO L87 Difference]: Start difference. First operand 3223 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:32:05,177 INFO L93 Difference]: Finished difference Result 5597 states and 19124 transitions. [2022-02-11 01:32:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 01:32:05,178 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:32:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:32:05,189 INFO L225 Difference]: With dead ends: 5597 [2022-02-11 01:32:05,189 INFO L226 Difference]: Without dead ends: 5553 [2022-02-11 01:32:05,190 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2022-02-11 01:32:05,190 INFO L934 BasicCegarLoop]: 50 mSDtfsCounter, 299 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:32:05,191 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 578 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1983 Invalid, 0 Unknown, 186 Unchecked, 0.8s Time] [2022-02-11 01:32:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5553 states. [2022-02-11 01:32:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5553 to 3237. [2022-02-11 01:32:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.620519159456119) internal successors, (11716), 3236 states have internal predecessors, (11716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 11716 transitions. [2022-02-11 01:32:05,266 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 11716 transitions. Word has length 26 [2022-02-11 01:32:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:32:05,266 INFO L470 AbstractCegarLoop]: Abstraction has 3237 states and 11716 transitions. [2022-02-11 01:32:05,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 11716 transitions. [2022-02-11 01:32:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:32:05,272 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:32:05,272 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:32:05,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-11 01:32:05,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-11 01:32:05,485 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:32:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:32:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 25 times [2022-02-11 01:32:05,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:32:05,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128036513] [2022-02-11 01:32:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:32:05,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:32:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:05,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:32:05,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128036513] [2022-02-11 01:32:05,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128036513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:32:05,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293948876] [2022-02-11 01:32:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:32:05,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:32:05,691 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) [2022-02-11 01:32:05,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 01:32:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:05,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:32:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:32:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:32:06,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:06,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:32:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:06,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:32:06,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:06,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:06,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-02-11 01:32:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:07,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293948876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:32:07,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:32:07,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:32:07,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970169243] [2022-02-11 01:32:07,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:32:07,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:32:07,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:32:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:32:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:32:07,605 INFO L87 Difference]: Start difference. First operand 3237 states and 11716 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:32:11,463 INFO L93 Difference]: Finished difference Result 6941 states and 22699 transitions. [2022-02-11 01:32:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:32:11,464 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:32:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:32:11,477 INFO L225 Difference]: With dead ends: 6941 [2022-02-11 01:32:11,477 INFO L226 Difference]: Without dead ends: 6911 [2022-02-11 01:32:11,478 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1205, Invalid=4051, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 01:32:11,478 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 522 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:32:11,478 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 339 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1298 Invalid, 0 Unknown, 58 Unchecked, 0.7s Time] [2022-02-11 01:32:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2022-02-11 01:32:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 3338. [2022-02-11 01:32:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 3.6251123763859754) internal successors, (12097), 3337 states have internal predecessors, (12097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 12097 transitions. [2022-02-11 01:32:11,555 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 12097 transitions. Word has length 26 [2022-02-11 01:32:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:32:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 12097 transitions. [2022-02-11 01:32:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 12097 transitions. [2022-02-11 01:32:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:32:11,560 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:32:11,560 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:32:11,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 01:32:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-11 01:32:11,763 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:32:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:32:11,764 INFO L85 PathProgramCache]: Analyzing trace with hash 397567668, now seen corresponding path program 26 times [2022-02-11 01:32:11,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:32:11,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443868087] [2022-02-11 01:32:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:32:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:32:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:12,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:32:12,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443868087] [2022-02-11 01:32:12,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443868087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:32:12,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378203992] [2022-02-11 01:32:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:32:12,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:32:12,074 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) [2022-02-11 01:32:12,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 01:32:12,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:32:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:32:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:32:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:32:12,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:12,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:32:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:13,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:32:13,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:13,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:13,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:13,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-02-11 01:32:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:14,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378203992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:32:14,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:32:14,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 01:32:14,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635987283] [2022-02-11 01:32:14,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:32:14,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:32:14,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:32:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:32:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:32:14,307 INFO L87 Difference]: Start difference. First operand 3338 states and 12097 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:32:25,058 INFO L93 Difference]: Finished difference Result 7210 states and 24172 transitions. [2022-02-11 01:32:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-11 01:32:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:32:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:32:25,073 INFO L225 Difference]: With dead ends: 7210 [2022-02-11 01:32:25,073 INFO L226 Difference]: Without dead ends: 7165 [2022-02-11 01:32:25,074 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5504 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2510, Invalid=11770, Unknown=0, NotChecked=0, Total=14280 [2022-02-11 01:32:25,074 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 775 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:32:25,075 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 646 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1589 Invalid, 0 Unknown, 727 Unchecked, 1.0s Time] [2022-02-11 01:32:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-02-11 01:32:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 3373. [2022-02-11 01:32:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3372 states have (on average 3.6370106761565837) internal successors, (12264), 3372 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 12264 transitions. [2022-02-11 01:32:25,158 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 12264 transitions. Word has length 26 [2022-02-11 01:32:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:32:25,158 INFO L470 AbstractCegarLoop]: Abstraction has 3373 states and 12264 transitions. [2022-02-11 01:32:25,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 12264 transitions. [2022-02-11 01:32:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:32:25,163 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:32:25,163 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:32:25,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-11 01:32:25,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 01:32:25,374 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:32:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:32:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1096340054, now seen corresponding path program 27 times [2022-02-11 01:32:25,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:32:25,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81841005] [2022-02-11 01:32:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:32:25,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:32:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:25,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:32:25,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81841005] [2022-02-11 01:32:25,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81841005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:32:25,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234428125] [2022-02-11 01:32:25,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:32:25,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:25,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:32:25,777 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) [2022-02-11 01:32:25,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 01:32:25,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:32:25,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:32:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:32:25,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:32:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:32:26,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:26,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:32:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:26,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:32:26,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:26,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:26,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-02-11 01:32:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:28,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234428125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:32:28,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:32:28,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:32:28,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192192377] [2022-02-11 01:32:28,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:32:28,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:32:28,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:32:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:32:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:32:28,364 INFO L87 Difference]: Start difference. First operand 3373 states and 12264 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:32:33,280 INFO L93 Difference]: Finished difference Result 7051 states and 23276 transitions. [2022-02-11 01:32:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:32:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:32:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:32:33,294 INFO L225 Difference]: With dead ends: 7051 [2022-02-11 01:32:33,295 INFO L226 Difference]: Without dead ends: 7044 [2022-02-11 01:32:33,295 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1146, Invalid=4110, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 01:32:33,295 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 506 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:32:33,295 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 364 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1477 Invalid, 0 Unknown, 62 Unchecked, 0.9s Time] [2022-02-11 01:32:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7044 states. [2022-02-11 01:32:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7044 to 3360. [2022-02-11 01:32:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.6394760345340877) internal successors, (12225), 3359 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 12225 transitions. [2022-02-11 01:32:33,375 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 12225 transitions. Word has length 26 [2022-02-11 01:32:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:32:33,375 INFO L470 AbstractCegarLoop]: Abstraction has 3360 states and 12225 transitions. [2022-02-11 01:32:33,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 12225 transitions. [2022-02-11 01:32:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:32:33,381 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:32:33,381 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:32:33,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 01:32:33,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-02-11 01:32:33,595 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:32:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:32:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1623096648, now seen corresponding path program 28 times [2022-02-11 01:32:33,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:32:33,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70547580] [2022-02-11 01:32:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:32:33,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:32:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:33,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:32:33,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70547580] [2022-02-11 01:32:33,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70547580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:32:33,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275335298] [2022-02-11 01:32:33,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:32:33,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:32:33,909 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) [2022-02-11 01:32:33,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 01:32:33,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:32:33,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:32:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:32:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:32:34,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:32:34,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:34,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:32:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:34,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:32:35,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:35,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:35,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-02-11 01:32:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:37,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275335298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:32:37,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:32:37,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:32:37,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586055945] [2022-02-11 01:32:37,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:32:37,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:32:37,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:32:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:32:37,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:32:37,339 INFO L87 Difference]: Start difference. First operand 3360 states and 12225 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:32:41,385 INFO L93 Difference]: Finished difference Result 6877 states and 22705 transitions. [2022-02-11 01:32:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:32:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:32:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:32:41,398 INFO L225 Difference]: With dead ends: 6877 [2022-02-11 01:32:41,398 INFO L226 Difference]: Without dead ends: 6847 [2022-02-11 01:32:41,398 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1249, Invalid=4603, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 01:32:41,399 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 438 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:32:41,399 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 455 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1346 Invalid, 0 Unknown, 241 Unchecked, 0.7s Time] [2022-02-11 01:32:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2022-02-11 01:32:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 3372. [2022-02-11 01:32:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 3.6407594185701573) internal successors, (12273), 3371 states have internal predecessors, (12273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 12273 transitions. [2022-02-11 01:32:41,476 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 12273 transitions. Word has length 26 [2022-02-11 01:32:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:32:41,476 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 12273 transitions. [2022-02-11 01:32:41,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 12273 transitions. [2022-02-11 01:32:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:32:41,481 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:32:41,481 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:32:41,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-11 01:32:41,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:41,697 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:32:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:32:41,697 INFO L85 PathProgramCache]: Analyzing trace with hash 5563868, now seen corresponding path program 29 times [2022-02-11 01:32:41,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:32:41,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462040526] [2022-02-11 01:32:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:32:41,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:32:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:42,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:32:42,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462040526] [2022-02-11 01:32:42,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462040526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:32:42,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913998492] [2022-02-11 01:32:42,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:32:42,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:42,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:32:42,010 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) [2022-02-11 01:32:42,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 01:32:42,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:32:42,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:32:42,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:32:42,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:32:42,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:32:42,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:42,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:32:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:42,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:32:43,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:43,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:43,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 181 [2022-02-11 01:32:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:45,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913998492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:32:45,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:32:45,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:32:45,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103434274] [2022-02-11 01:32:45,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:32:45,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:32:45,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:32:45,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:32:45,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:32:45,030 INFO L87 Difference]: Start difference. First operand 3372 states and 12273 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) [2022-02-11 01:32:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:32:54,138 INFO L93 Difference]: Finished difference Result 8010 states and 26236 transitions. [2022-02-11 01:32:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-11 01:32:54,138 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 26 [2022-02-11 01:32:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:32:54,154 INFO L225 Difference]: With dead ends: 8010 [2022-02-11 01:32:54,154 INFO L226 Difference]: Without dead ends: 7965 [2022-02-11 01:32:54,155 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2169, Invalid=9173, Unknown=0, NotChecked=0, Total=11342 [2022-02-11 01:32:54,155 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 727 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:32:54,155 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 459 Invalid, 2439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1054 Invalid, 0 Unknown, 1272 Unchecked, 0.7s Time] [2022-02-11 01:32:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2022-02-11 01:32:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 3436. [2022-02-11 01:32:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.650655021834061) internal successors, (12540), 3435 states have internal predecessors, (12540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:32:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 12540 transitions. [2022-02-11 01:32:54,282 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 12540 transitions. Word has length 26 [2022-02-11 01:32:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:32:54,282 INFO L470 AbstractCegarLoop]: Abstraction has 3436 states and 12540 transitions. [2022-02-11 01:32:54,282 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) [2022-02-11 01:32:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 12540 transitions. [2022-02-11 01:32:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:32:54,287 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:32:54,287 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:32:54,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-11 01:32:54,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:54,503 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:32:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:32:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1809601360, now seen corresponding path program 42 times [2022-02-11 01:32:54,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:32:54,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011734966] [2022-02-11 01:32:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:32:54,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:32:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:32:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:54,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:32:54,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011734966] [2022-02-11 01:32:54,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011734966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:32:54,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717817726] [2022-02-11 01:32:54,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:32:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:32:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:32:54,690 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) [2022-02-11 01:32:54,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 01:32:54,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:32:54,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:32:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:32:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:32:55,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:55,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 115 [2022-02-11 01:32:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:56,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:32:57,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:57,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:32:57,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:32:57,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-02-11 01:32:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:32:57,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717817726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:32:57,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:32:57,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-02-11 01:32:57,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127279294] [2022-02-11 01:32:57,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:32:57,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:32:57,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:32:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:32:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:32:57,683 INFO L87 Difference]: Start difference. First operand 3436 states and 12540 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:33:18,028 INFO L93 Difference]: Finished difference Result 11873 states and 40846 transitions. [2022-02-11 01:33:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-02-11 01:33:18,028 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:33:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:33:18,055 INFO L225 Difference]: With dead ends: 11873 [2022-02-11 01:33:18,055 INFO L226 Difference]: Without dead ends: 11816 [2022-02-11 01:33:18,058 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31261 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=9130, Invalid=59776, Unknown=0, NotChecked=0, Total=68906 [2022-02-11 01:33:18,059 INFO L934 BasicCegarLoop]: 59 mSDtfsCounter, 771 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 5822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3077 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:33:18,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 885 Invalid, 5822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2565 Invalid, 0 Unknown, 3077 Unchecked, 1.2s Time] [2022-02-11 01:33:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11816 states. [2022-02-11 01:33:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11816 to 3622. [2022-02-11 01:33:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 3.683789008561171) internal successors, (13339), 3621 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 13339 transitions. [2022-02-11 01:33:18,259 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 13339 transitions. Word has length 26 [2022-02-11 01:33:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:33:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 13339 transitions. [2022-02-11 01:33:18,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 13339 transitions. [2022-02-11 01:33:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:33:18,264 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:33:18,264 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:33:18,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 01:33:18,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:18,479 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:33:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:33:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1901962258, now seen corresponding path program 43 times [2022-02-11 01:33:18,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:33:18,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909662263] [2022-02-11 01:33:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:33:18,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:33:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:33:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:18,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:33:18,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909662263] [2022-02-11 01:33:18,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909662263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:33:18,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583637144] [2022-02-11 01:33:18,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:33:18,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:18,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:33:18,660 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) [2022-02-11 01:33:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:33:18,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 01:33:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:33:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:33:19,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:33:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:33:19,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:19,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 107 [2022-02-11 01:33:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:20,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:33:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:21,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:21,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-02-11 01:33:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:22,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583637144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:33:22,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:33:22,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-02-11 01:33:22,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742723815] [2022-02-11 01:33:22,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:33:22,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:33:22,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:33:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:33:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:33:22,139 INFO L87 Difference]: Start difference. First operand 3622 states and 13339 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:33:24,907 INFO L93 Difference]: Finished difference Result 6615 states and 22720 transitions. [2022-02-11 01:33:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:33:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:33:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:33:24,923 INFO L225 Difference]: With dead ends: 6615 [2022-02-11 01:33:24,924 INFO L226 Difference]: Without dead ends: 6551 [2022-02-11 01:33:24,924 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1226, Invalid=5094, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:33:24,924 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 577 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 911 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:33:24,925 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 356 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 761 Invalid, 0 Unknown, 911 Unchecked, 0.4s Time] [2022-02-11 01:33:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2022-02-11 01:33:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 3723. [2022-02-11 01:33:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3722 states have (on average 3.6829661472326705) internal successors, (13708), 3722 states have internal predecessors, (13708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 13708 transitions. [2022-02-11 01:33:25,007 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 13708 transitions. Word has length 26 [2022-02-11 01:33:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:33:25,007 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 13708 transitions. [2022-02-11 01:33:25,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 13708 transitions. [2022-02-11 01:33:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:33:25,013 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:33:25,013 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:33:25,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 01:33:25,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-11 01:33:25,215 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:33:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:33:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1873974798, now seen corresponding path program 30 times [2022-02-11 01:33:25,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:33:25,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275469607] [2022-02-11 01:33:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:33:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:33:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:33:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:25,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:33:25,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275469607] [2022-02-11 01:33:25,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275469607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:33:25,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097004149] [2022-02-11 01:33:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:33:25,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:33:25,475 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) [2022-02-11 01:33:25,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 01:33:25,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:33:25,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:33:25,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:33:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:33:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:33:26,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:26,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:33:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:26,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:33:26,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:26,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:26,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:26,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 195 treesize of output 153 [2022-02-11 01:33:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:27,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097004149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:33:27,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:33:27,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-02-11 01:33:27,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510872977] [2022-02-11 01:33:27,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:33:27,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:33:27,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:33:27,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:33:27,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:33:27,427 INFO L87 Difference]: Start difference. First operand 3723 states and 13708 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:33:32,440 INFO L93 Difference]: Finished difference Result 6927 states and 23829 transitions. [2022-02-11 01:33:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:33:32,440 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:33:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:33:32,454 INFO L225 Difference]: With dead ends: 6927 [2022-02-11 01:33:32,455 INFO L226 Difference]: Without dead ends: 6891 [2022-02-11 01:33:32,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=869, Invalid=3961, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:33:32,455 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 421 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:33:32,456 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 449 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 828 Invalid, 0 Unknown, 790 Unchecked, 0.5s Time] [2022-02-11 01:33:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2022-02-11 01:33:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 3731. [2022-02-11 01:33:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3730 states have (on average 3.683646112600536) internal successors, (13740), 3730 states have internal predecessors, (13740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 13740 transitions. [2022-02-11 01:33:32,562 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 13740 transitions. Word has length 26 [2022-02-11 01:33:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:33:32,562 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 13740 transitions. [2022-02-11 01:33:32,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 13740 transitions. [2022-02-11 01:33:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:33:32,567 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:33:32,567 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:33:32,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-11 01:33:32,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:32,783 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:33:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:33:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1198785412, now seen corresponding path program 31 times [2022-02-11 01:33:32,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:33:32,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551089642] [2022-02-11 01:33:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:33:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:33:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:33:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:33,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:33:33,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551089642] [2022-02-11 01:33:33,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551089642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:33:33,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690065876] [2022-02-11 01:33:33,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:33:33,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:33,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:33:33,070 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) [2022-02-11 01:33:33,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 01:33:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:33:33,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:33:33,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:33:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:33:33,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:33,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:33:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:33,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:33:34,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:34,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:34,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-02-11 01:33:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:35,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690065876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:33:35,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:33:35,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:33:35,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035482970] [2022-02-11 01:33:35,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:33:35,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:33:35,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:33:35,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:33:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:33:35,547 INFO L87 Difference]: Start difference. First operand 3731 states and 13740 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:33:37,268 INFO L93 Difference]: Finished difference Result 5891 states and 20036 transitions. [2022-02-11 01:33:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 01:33:37,268 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:33:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:33:37,279 INFO L225 Difference]: With dead ends: 5891 [2022-02-11 01:33:37,280 INFO L226 Difference]: Without dead ends: 5839 [2022-02-11 01:33:37,280 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 01:33:37,281 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 333 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:33:37,282 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 393 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 824 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-02-11 01:33:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2022-02-11 01:33:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 3748. [2022-02-11 01:33:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 3.6872164398185214) internal successors, (13816), 3747 states have internal predecessors, (13816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 13816 transitions. [2022-02-11 01:33:37,376 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 13816 transitions. Word has length 26 [2022-02-11 01:33:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:33:37,376 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 13816 transitions. [2022-02-11 01:33:37,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 13816 transitions. [2022-02-11 01:33:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:33:37,382 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:33:37,382 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:33:37,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 01:33:37,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:37,600 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:33:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:33:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash -862074390, now seen corresponding path program 32 times [2022-02-11 01:33:37,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:33:37,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735762798] [2022-02-11 01:33:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:33:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:33:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:33:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:37,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:33:37,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735762798] [2022-02-11 01:33:37,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735762798] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:33:37,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033605459] [2022-02-11 01:33:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:33:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:37,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:33:37,847 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) [2022-02-11 01:33:37,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 01:33:37,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:33:37,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:33:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:33:37,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:33:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:33:38,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:38,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:33:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:38,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:33:38,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:38,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:38,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:38,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-02-11 01:33:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:39,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033605459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:33:39,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:33:39,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-02-11 01:33:39,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371069738] [2022-02-11 01:33:39,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:33:39,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:33:39,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:33:39,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:33:39,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:33:39,487 INFO L87 Difference]: Start difference. First operand 3748 states and 13816 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:33:48,639 INFO L93 Difference]: Finished difference Result 6519 states and 22560 transitions. [2022-02-11 01:33:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-11 01:33:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:33:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:33:48,653 INFO L225 Difference]: With dead ends: 6519 [2022-02-11 01:33:48,653 INFO L226 Difference]: Without dead ends: 6481 [2022-02-11 01:33:48,654 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1571, Invalid=8131, Unknown=0, NotChecked=0, Total=9702 [2022-02-11 01:33:48,654 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 510 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1083 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:33:48,654 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 486 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1089 Invalid, 0 Unknown, 1083 Unchecked, 0.7s Time] [2022-02-11 01:33:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2022-02-11 01:33:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 3765. [2022-02-11 01:33:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3764 states have (on average 3.684643995749203) internal successors, (13869), 3764 states have internal predecessors, (13869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 13869 transitions. [2022-02-11 01:33:48,758 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 13869 transitions. Word has length 26 [2022-02-11 01:33:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:33:48,758 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 13869 transitions. [2022-02-11 01:33:48,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:33:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 13869 transitions. [2022-02-11 01:33:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:33:48,765 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:33:48,765 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:33:48,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-11 01:33:48,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-11 01:33:48,974 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:33:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:33:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash -418747368, now seen corresponding path program 33 times [2022-02-11 01:33:48,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:33:48,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687593090] [2022-02-11 01:33:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:33:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:33:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:33:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:49,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:33:49,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687593090] [2022-02-11 01:33:49,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687593090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:33:49,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843448917] [2022-02-11 01:33:49,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:33:49,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:33:49,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:33:49,291 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) [2022-02-11 01:33:49,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 01:33:49,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:33:49,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:33:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:33:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:33:49,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:49,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:33:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:50,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:33:50,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:50,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:33:50,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:33:50,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-02-11 01:33:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:33:51,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843448917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:33:51,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:33:51,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-02-11 01:33:51,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550081253] [2022-02-11 01:33:51,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:33:51,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:33:51,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:33:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:33:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:33:51,606 INFO L87 Difference]: Start difference. First operand 3765 states and 13869 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:34:00,818 INFO L93 Difference]: Finished difference Result 7964 states and 26967 transitions. [2022-02-11 01:34:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-11 01:34:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:34:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:34:00,835 INFO L225 Difference]: With dead ends: 7964 [2022-02-11 01:34:00,835 INFO L226 Difference]: Without dead ends: 7920 [2022-02-11 01:34:00,836 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4507 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2125, Invalid=10307, Unknown=0, NotChecked=0, Total=12432 [2022-02-11 01:34:00,836 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 740 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1220 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:34:00,836 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 519 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1220 Invalid, 0 Unknown, 1220 Unchecked, 0.7s Time] [2022-02-11 01:34:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2022-02-11 01:34:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 3753. [2022-02-11 01:34:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.679904051172708) internal successors, (13807), 3752 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 13807 transitions. [2022-02-11 01:34:00,934 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 13807 transitions. Word has length 26 [2022-02-11 01:34:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:34:00,934 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 13807 transitions. [2022-02-11 01:34:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 13807 transitions. [2022-02-11 01:34:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:34:00,941 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:34:00,941 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:34:00,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 01:34:01,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-11 01:34:01,158 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:34:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:34:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 34 times [2022-02-11 01:34:01,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:34:01,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558300658] [2022-02-11 01:34:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:34:01,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:34:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:34:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:01,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:34:01,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558300658] [2022-02-11 01:34:01,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558300658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:34:01,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172451657] [2022-02-11 01:34:01,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:34:01,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:01,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:34:01,418 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) [2022-02-11 01:34:01,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 01:34:01,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:34:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:34:01,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:34:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:34:01,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:34:01,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:01,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:34:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:02,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:34:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:34:02,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:02,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 177 [2022-02-11 01:34:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:04,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172451657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:34:04,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:34:04,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:34:04,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415963649] [2022-02-11 01:34:04,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:34:04,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:34:04,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:34:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:34:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:34:04,030 INFO L87 Difference]: Start difference. First operand 3753 states and 13807 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) [2022-02-11 01:34:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:34:05,020 INFO L93 Difference]: Finished difference Result 5077 states and 17821 transitions. [2022-02-11 01:34:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 01:34:05,021 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 26 [2022-02-11 01:34:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:34:05,031 INFO L225 Difference]: With dead ends: 5077 [2022-02-11 01:34:05,031 INFO L226 Difference]: Without dead ends: 5005 [2022-02-11 01:34:05,031 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:34:05,032 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:34:05,032 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 276 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-02-11 01:34:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2022-02-11 01:34:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3803. [2022-02-11 01:34:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 3.683587585481326) internal successors, (14005), 3802 states have internal predecessors, (14005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 14005 transitions. [2022-02-11 01:34:05,096 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 14005 transitions. Word has length 26 [2022-02-11 01:34:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:34:05,096 INFO L470 AbstractCegarLoop]: Abstraction has 3803 states and 14005 transitions. [2022-02-11 01:34:05,097 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) [2022-02-11 01:34:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 14005 transitions. [2022-02-11 01:34:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:34:05,102 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:34:05,103 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:34:05,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-11 01:34:05,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:05,318 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:34:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:34:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1643224858, now seen corresponding path program 35 times [2022-02-11 01:34:05,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:34:05,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910048413] [2022-02-11 01:34:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:34:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:34:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:34:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:05,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:34:05,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910048413] [2022-02-11 01:34:05,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910048413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:34:05,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695647012] [2022-02-11 01:34:05,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:34:05,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:05,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:34:05,658 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) [2022-02-11 01:34:05,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 01:34:05,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:34:05,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:34:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:34:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:34:06,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:34:06,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:06,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:34:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:06,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:34:06,724 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:34:06,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-02-11 01:34:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:07,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695647012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:34:07,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:34:07,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 01:34:07,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547067007] [2022-02-11 01:34:07,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:34:07,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:34:07,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:34:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:34:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:34:07,820 INFO L87 Difference]: Start difference. First operand 3803 states and 14005 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-02-11 01:34:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:34:09,478 INFO L93 Difference]: Finished difference Result 5945 states and 20361 transitions. [2022-02-11 01:34:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 01:34:09,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 26 [2022-02-11 01:34:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:34:09,490 INFO L225 Difference]: With dead ends: 5945 [2022-02-11 01:34:09,491 INFO L226 Difference]: Without dead ends: 5895 [2022-02-11 01:34:09,491 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:34:09,491 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 233 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:34:09,491 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 379 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 744 Invalid, 0 Unknown, 545 Unchecked, 0.3s Time] [2022-02-11 01:34:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-02-11 01:34:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 3811. [2022-02-11 01:34:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.6811023622047245) internal successors, (14025), 3810 states have internal predecessors, (14025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 14025 transitions. [2022-02-11 01:34:09,563 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 14025 transitions. Word has length 26 [2022-02-11 01:34:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:34:09,563 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 14025 transitions. [2022-02-11 01:34:09,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2022-02-11 01:34:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 14025 transitions. [2022-02-11 01:34:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:34:09,568 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:34:09,569 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:34:09,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-11 01:34:09,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:09,784 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:34:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:34:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 855040588, now seen corresponding path program 36 times [2022-02-11 01:34:09,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:34:09,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848695421] [2022-02-11 01:34:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:34:09,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:34:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:34:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:10,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:34:10,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848695421] [2022-02-11 01:34:10,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848695421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:34:10,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164741991] [2022-02-11 01:34:10,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:34:10,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:10,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:34:10,172 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) [2022-02-11 01:34:10,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 01:34:10,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:34:10,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:34:10,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:34:10,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:34:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:34:10,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:10,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:34:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:11,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:34:11,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:34:11,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:11,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 157 [2022-02-11 01:34:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:12,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164741991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:34:12,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:34:12,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-11 01:34:12,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904976670] [2022-02-11 01:34:12,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:34:12,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:34:12,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:34:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:34:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:34:12,863 INFO L87 Difference]: Start difference. First operand 3811 states and 14025 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:34:16,503 INFO L93 Difference]: Finished difference Result 7624 states and 25602 transitions. [2022-02-11 01:34:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:34:16,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:34:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:34:16,519 INFO L225 Difference]: With dead ends: 7624 [2022-02-11 01:34:16,519 INFO L226 Difference]: Without dead ends: 7552 [2022-02-11 01:34:16,519 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1049, Invalid=5271, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:34:16,519 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 436 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:34:16,519 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 531 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1682 Invalid, 0 Unknown, 455 Unchecked, 0.8s Time] [2022-02-11 01:34:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7552 states. [2022-02-11 01:34:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7552 to 3729. [2022-02-11 01:34:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.677038626609442) internal successors, (13708), 3728 states have internal predecessors, (13708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 13708 transitions. [2022-02-11 01:34:16,605 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 13708 transitions. Word has length 26 [2022-02-11 01:34:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:34:16,605 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 13708 transitions. [2022-02-11 01:34:16,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 13708 transitions. [2022-02-11 01:34:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:34:16,611 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:34:16,611 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:34:16,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-11 01:34:16,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-11 01:34:16,814 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:34:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:34:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1924650992, now seen corresponding path program 44 times [2022-02-11 01:34:16,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:34:16,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542050259] [2022-02-11 01:34:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:34:16,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:34:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:34:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:17,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:34:17,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542050259] [2022-02-11 01:34:17,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542050259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:34:17,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186783345] [2022-02-11 01:34:17,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:34:17,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:17,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:34:17,077 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) [2022-02-11 01:34:17,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 01:34:17,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:34:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:34:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:34:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:34:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:34:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:34:17,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:17,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-02-11 01:34:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:18,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:34:18,524 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:34:18,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-02-11 01:34:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:19,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186783345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:34:19,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:34:19,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-02-11 01:34:19,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236982367] [2022-02-11 01:34:19,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:34:19,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:34:19,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:34:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:34:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:34:19,096 INFO L87 Difference]: Start difference. First operand 3729 states and 13708 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:34:31,242 INFO L93 Difference]: Finished difference Result 8392 states and 28354 transitions. [2022-02-11 01:34:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-02-11 01:34:31,243 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:34:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:34:31,258 INFO L225 Difference]: With dead ends: 8392 [2022-02-11 01:34:31,259 INFO L226 Difference]: Without dead ends: 8324 [2022-02-11 01:34:31,260 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16099 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=5548, Invalid=32672, Unknown=0, NotChecked=0, Total=38220 [2022-02-11 01:34:31,260 INFO L934 BasicCegarLoop]: 67 mSDtfsCounter, 533 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:34:31,261 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 881 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 01:34:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8324 states. [2022-02-11 01:34:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8324 to 3825. [2022-02-11 01:34:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 3.672855648535565) internal successors, (14045), 3824 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 14045 transitions. [2022-02-11 01:34:31,346 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 14045 transitions. Word has length 26 [2022-02-11 01:34:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:34:31,346 INFO L470 AbstractCegarLoop]: Abstraction has 3825 states and 14045 transitions. [2022-02-11 01:34:31,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:34:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 14045 transitions. [2022-02-11 01:34:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:34:31,351 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:34:31,351 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:34:31,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-11 01:34:31,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:31,567 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:34:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:34:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1576521584, now seen corresponding path program 45 times [2022-02-11 01:34:31,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:34:31,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628230483] [2022-02-11 01:34:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:34:31,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:34:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:34:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:31,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:34:31,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628230483] [2022-02-11 01:34:31,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628230483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:34:31,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594778786] [2022-02-11 01:34:31,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:34:31,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:34:31,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:34:31,792 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) [2022-02-11 01:34:31,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 01:34:31,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:34:31,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:34:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:34:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:34:32,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:32,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 115 [2022-02-11 01:34:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:35,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:34:35,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:34:35,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:34:35,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:34:35,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 111 [2022-02-11 01:34:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:34:35,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594778786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:34:35,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:34:35,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2022-02-11 01:34:35,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329816498] [2022-02-11 01:34:35,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:34:35,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:34:35,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:34:36,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:34:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:34:36,000 INFO L87 Difference]: Start difference. First operand 3825 states and 14045 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:35:00,778 INFO L93 Difference]: Finished difference Result 12957 states and 43362 transitions. [2022-02-11 01:35:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-02-11 01:35:00,778 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:35:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:35:00,811 INFO L225 Difference]: With dead ends: 12957 [2022-02-11 01:35:00,812 INFO L226 Difference]: Without dead ends: 12868 [2022-02-11 01:35:00,814 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 42 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 36416 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=10227, Invalid=61865, Unknown=0, NotChecked=0, Total=72092 [2022-02-11 01:35:00,814 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 777 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3318 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:35:00,814 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 1199 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2680 Invalid, 0 Unknown, 3318 Unchecked, 1.3s Time] [2022-02-11 01:35:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12868 states. [2022-02-11 01:35:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12868 to 3970. [2022-02-11 01:35:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3969 states have (on average 3.673217435122197) internal successors, (14579), 3969 states have internal predecessors, (14579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 14579 transitions. [2022-02-11 01:35:00,970 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 14579 transitions. Word has length 26 [2022-02-11 01:35:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:35:00,970 INFO L470 AbstractCegarLoop]: Abstraction has 3970 states and 14579 transitions. [2022-02-11 01:35:00,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 14579 transitions. [2022-02-11 01:35:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:35:00,976 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:35:00,977 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:35:00,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-11 01:35:01,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:01,193 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:35:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:35:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash 933591496, now seen corresponding path program 46 times [2022-02-11 01:35:01,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:35:01,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747380052] [2022-02-11 01:35:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:35:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:35:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:35:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:01,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:35:01,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747380052] [2022-02-11 01:35:01,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747380052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:35:01,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10289989] [2022-02-11 01:35:01,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:35:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:01,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:35:01,482 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) [2022-02-11 01:35:01,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 01:35:01,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:35:01,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:35:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:35:01,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:35:02,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:02,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:02,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:02,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 75 [2022-02-11 01:35:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:02,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:35:02,743 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:35:02,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:35:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:03,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10289989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:35:03,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:35:03,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 01:35:03,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060844583] [2022-02-11 01:35:03,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:35:03,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:35:03,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:35:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:35:03,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:35:03,241 INFO L87 Difference]: Start difference. First operand 3970 states and 14579 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2022-02-11 01:35:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:35:10,520 INFO L93 Difference]: Finished difference Result 6681 states and 23043 transitions. [2022-02-11 01:35:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-11 01:35:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 26 [2022-02-11 01:35:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:35:10,535 INFO L225 Difference]: With dead ends: 6681 [2022-02-11 01:35:10,536 INFO L226 Difference]: Without dead ends: 6644 [2022-02-11 01:35:10,536 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2128, Invalid=11914, Unknown=0, NotChecked=0, Total=14042 [2022-02-11 01:35:10,537 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 533 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:35:10,537 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 546 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2318 Invalid, 0 Unknown, 84 Unchecked, 1.2s Time] [2022-02-11 01:35:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2022-02-11 01:35:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 3968. [2022-02-11 01:35:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.6748172422485506) internal successors, (14578), 3967 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14578 transitions. [2022-02-11 01:35:10,624 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14578 transitions. Word has length 26 [2022-02-11 01:35:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:35:10,624 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 14578 transitions. [2022-02-11 01:35:10,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2022-02-11 01:35:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14578 transitions. [2022-02-11 01:35:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:35:10,631 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:35:10,631 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:35:10,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 01:35:10,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-11 01:35:10,847 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:35:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:35:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1662477820, now seen corresponding path program 47 times [2022-02-11 01:35:10,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:35:10,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745449660] [2022-02-11 01:35:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:35:10,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:35:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:35:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:11,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:35:11,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745449660] [2022-02-11 01:35:11,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745449660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:35:11,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666995221] [2022-02-11 01:35:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:35:11,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:35:11,103 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) [2022-02-11 01:35:11,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 01:35:11,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:35:11,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:35:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:35:11,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:35:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:11,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:11,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 103 [2022-02-11 01:35:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:12,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:35:13,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:13,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:13,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:13,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 99 [2022-02-11 01:35:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:13,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666995221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:35:13,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:35:13,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 26 [2022-02-11 01:35:13,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126392597] [2022-02-11 01:35:13,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:35:13,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:35:13,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:35:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:35:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:35:13,359 INFO L87 Difference]: Start difference. First operand 3968 states and 14578 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) [2022-02-11 01:35:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:35:15,979 INFO L93 Difference]: Finished difference Result 5911 states and 20811 transitions. [2022-02-11 01:35:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:35:15,979 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 26 [2022-02-11 01:35:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:35:15,991 INFO L225 Difference]: With dead ends: 5911 [2022-02-11 01:35:15,992 INFO L226 Difference]: Without dead ends: 5881 [2022-02-11 01:35:15,992 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 01:35:15,992 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 330 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:35:15,992 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 334 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 844 Invalid, 0 Unknown, 408 Unchecked, 0.4s Time] [2022-02-11 01:35:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2022-02-11 01:35:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 3978. [2022-02-11 01:35:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 3.6743776716117678) internal successors, (14613), 3977 states have internal predecessors, (14613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 14613 transitions. [2022-02-11 01:35:16,076 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 14613 transitions. Word has length 26 [2022-02-11 01:35:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:35:16,076 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 14613 transitions. [2022-02-11 01:35:16,076 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) [2022-02-11 01:35:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 14613 transitions. [2022-02-11 01:35:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:35:16,083 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:35:16,083 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:35:16,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-11 01:35:16,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:16,299 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:35:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:35:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash 935903172, now seen corresponding path program 37 times [2022-02-11 01:35:16,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:35:16,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881860021] [2022-02-11 01:35:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:35:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:35:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:35:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:16,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:35:16,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881860021] [2022-02-11 01:35:16,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881860021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:35:16,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271943216] [2022-02-11 01:35:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:35:16,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:16,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:35:16,668 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) [2022-02-11 01:35:16,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 01:35:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:35:16,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:35:16,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:35:17,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:17,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:17,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:35:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:35:17,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:17,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:17,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:17,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 173 [2022-02-11 01:35:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:18,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271943216] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:35:18,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:35:18,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-11 01:35:18,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878782879] [2022-02-11 01:35:18,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:35:18,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:35:18,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:35:18,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:35:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:35:18,359 INFO L87 Difference]: Start difference. First operand 3978 states and 14613 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:35:21,712 INFO L93 Difference]: Finished difference Result 6734 states and 23271 transitions. [2022-02-11 01:35:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 01:35:21,713 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:35:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:35:21,727 INFO L225 Difference]: With dead ends: 6734 [2022-02-11 01:35:21,727 INFO L226 Difference]: Without dead ends: 6698 [2022-02-11 01:35:21,727 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=832, Invalid=3860, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:35:21,727 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 450 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:35:21,727 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 444 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1029 Invalid, 0 Unknown, 546 Unchecked, 0.6s Time] [2022-02-11 01:35:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6698 states. [2022-02-11 01:35:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6698 to 3974. [2022-02-11 01:35:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 3.6725396425874655) internal successors, (14591), 3973 states have internal predecessors, (14591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 14591 transitions. [2022-02-11 01:35:21,811 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 14591 transitions. Word has length 26 [2022-02-11 01:35:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:35:21,811 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 14591 transitions. [2022-02-11 01:35:21,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 14591 transitions. [2022-02-11 01:35:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:35:21,818 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:35:21,818 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:35:21,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-11 01:35:22,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:22,031 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:35:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:35:22,032 INFO L85 PathProgramCache]: Analyzing trace with hash 449327520, now seen corresponding path program 48 times [2022-02-11 01:35:22,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:35:22,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625265575] [2022-02-11 01:35:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:35:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:35:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:35:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:22,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:35:22,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625265575] [2022-02-11 01:35:22,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625265575] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:35:22,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32393996] [2022-02-11 01:35:22,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:35:22,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:35:22,290 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) [2022-02-11 01:35:22,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 01:35:22,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:35:22,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:35:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:35:22,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:35:22,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:22,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:22,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2022-02-11 01:35:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:23,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:35:23,779 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:35:23,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:35:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:24,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32393996] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:35:24,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:35:24,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-02-11 01:35:24,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896018287] [2022-02-11 01:35:24,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:35:24,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:35:24,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:35:24,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:35:24,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:35:24,350 INFO L87 Difference]: Start difference. First operand 3974 states and 14591 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:35:37,944 INFO L93 Difference]: Finished difference Result 8216 states and 28116 transitions. [2022-02-11 01:35:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-11 01:35:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:35:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:35:37,961 INFO L225 Difference]: With dead ends: 8216 [2022-02-11 01:35:37,961 INFO L226 Difference]: Without dead ends: 8162 [2022-02-11 01:35:37,962 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14421 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=5256, Invalid=29154, Unknown=0, NotChecked=0, Total=34410 [2022-02-11 01:35:37,962 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 635 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:35:37,963 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 589 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 01:35:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2022-02-11 01:35:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 3915. [2022-02-11 01:35:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 3.670669391926418) internal successors, (14367), 3914 states have internal predecessors, (14367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 14367 transitions. [2022-02-11 01:35:38,061 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 14367 transitions. Word has length 26 [2022-02-11 01:35:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:35:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 3915 states and 14367 transitions. [2022-02-11 01:35:38,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 14367 transitions. [2022-02-11 01:35:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:35:38,068 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:35:38,068 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:35:38,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-11 01:35:38,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-11 01:35:38,270 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:35:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:35:38,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1445850926, now seen corresponding path program 38 times [2022-02-11 01:35:38,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:35:38,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550581308] [2022-02-11 01:35:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:35:38,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:35:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:35:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:38,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:35:38,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550581308] [2022-02-11 01:35:38,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550581308] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:35:38,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096368639] [2022-02-11 01:35:38,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:35:38,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:38,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:35:38,585 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) [2022-02-11 01:35:38,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 01:35:38,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:35:38,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:35:38,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:35:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:35:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:39,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:39,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:35:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:39,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:35:39,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:39,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:35:39,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:39,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 195 treesize of output 153 [2022-02-11 01:35:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:40,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096368639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:35:40,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:35:40,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-02-11 01:35:40,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599876179] [2022-02-11 01:35:40,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:35:40,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:35:40,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:35:40,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:35:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:35:40,375 INFO L87 Difference]: Start difference. First operand 3915 states and 14367 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:35:44,823 INFO L93 Difference]: Finished difference Result 7328 states and 25133 transitions. [2022-02-11 01:35:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:35:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:35:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:35:44,841 INFO L225 Difference]: With dead ends: 7328 [2022-02-11 01:35:44,841 INFO L226 Difference]: Without dead ends: 7298 [2022-02-11 01:35:44,841 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=934, Invalid=4036, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 01:35:44,841 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 580 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1035 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:35:44,841 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 418 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 848 Invalid, 0 Unknown, 1035 Unchecked, 0.4s Time] [2022-02-11 01:35:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2022-02-11 01:35:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 3912. [2022-02-11 01:35:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 3.6709281513679364) internal successors, (14357), 3911 states have internal predecessors, (14357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 14357 transitions. [2022-02-11 01:35:44,937 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 14357 transitions. Word has length 26 [2022-02-11 01:35:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:35:44,938 INFO L470 AbstractCegarLoop]: Abstraction has 3912 states and 14357 transitions. [2022-02-11 01:35:44,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:35:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 14357 transitions. [2022-02-11 01:35:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:35:44,944 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:35:44,944 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:35:44,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-11 01:35:45,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:45,161 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:35:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:35:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash 898886322, now seen corresponding path program 39 times [2022-02-11 01:35:45,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:35:45,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673419869] [2022-02-11 01:35:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:35:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:35:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:35:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:45,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:35:45,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673419869] [2022-02-11 01:35:45,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673419869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:35:45,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289281780] [2022-02-11 01:35:45,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:35:45,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:35:45,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:35:45,451 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) [2022-02-11 01:35:45,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 01:35:45,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:35:45,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:35:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:35:45,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:35:45,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:35:45,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:46,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:35:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:46,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:35:47,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:35:47,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-02-11 01:35:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:35:55,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289281780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:35:55,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:35:55,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-02-11 01:35:55,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944634154] [2022-02-11 01:35:55,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:35:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:35:55,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:35:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:35:55,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:35:55,310 INFO L87 Difference]: Start difference. First operand 3912 states and 14357 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) [2022-02-11 01:36:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:36:08,059 INFO L93 Difference]: Finished difference Result 10739 states and 35315 transitions. [2022-02-11 01:36:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-11 01:36:08,059 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 26 [2022-02-11 01:36:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:36:08,082 INFO L225 Difference]: With dead ends: 10739 [2022-02-11 01:36:08,083 INFO L226 Difference]: Without dead ends: 10705 [2022-02-11 01:36:08,084 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8230 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3448, Invalid=17722, Unknown=0, NotChecked=0, Total=21170 [2022-02-11 01:36:08,084 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 761 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:36:08,084 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 584 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1699 Invalid, 0 Unknown, 610 Unchecked, 1.1s Time] [2022-02-11 01:36:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2022-02-11 01:36:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 3884. [2022-02-11 01:36:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3883 states have (on average 3.6677826422868915) internal successors, (14242), 3883 states have internal predecessors, (14242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 14242 transitions. [2022-02-11 01:36:08,216 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 14242 transitions. Word has length 26 [2022-02-11 01:36:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:36:08,216 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 14242 transitions. [2022-02-11 01:36:08,216 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) [2022-02-11 01:36:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 14242 transitions. [2022-02-11 01:36:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:36:08,222 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:36:08,222 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:36:08,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-11 01:36:08,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:08,435 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:36:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:36:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash 764191466, now seen corresponding path program 40 times [2022-02-11 01:36:08,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:36:08,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302291983] [2022-02-11 01:36:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:36:08,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:36:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:36:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:08,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:36:08,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302291983] [2022-02-11 01:36:08,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302291983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:36:08,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473814700] [2022-02-11 01:36:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:36:08,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:36:08,724 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) [2022-02-11 01:36:08,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 01:36:08,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:36:08,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:36:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:36:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:36:09,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:36:09,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:09,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:36:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:09,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:36:10,029 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:36:10,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:36:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:11,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473814700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:36:11,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:36:11,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:36:11,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493240907] [2022-02-11 01:36:11,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:36:11,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:36:11,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:36:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:36:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:36:11,426 INFO L87 Difference]: Start difference. First operand 3884 states and 14242 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:36:14,169 INFO L93 Difference]: Finished difference Result 6453 states and 22188 transitions. [2022-02-11 01:36:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:36:14,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:36:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:36:14,184 INFO L225 Difference]: With dead ends: 6453 [2022-02-11 01:36:14,184 INFO L226 Difference]: Without dead ends: 6408 [2022-02-11 01:36:14,184 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=691, Invalid=4421, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:36:14,185 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 312 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:36:14,185 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 356 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:36:14,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2022-02-11 01:36:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 3886. [2022-02-11 01:36:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 3.6707850707850707) internal successors, (14261), 3885 states have internal predecessors, (14261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 14261 transitions. [2022-02-11 01:36:14,270 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 14261 transitions. Word has length 26 [2022-02-11 01:36:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:36:14,270 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 14261 transitions. [2022-02-11 01:36:14,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 14261 transitions. [2022-02-11 01:36:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:36:14,276 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:36:14,277 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:36:14,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-11 01:36:14,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:14,492 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:36:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:36:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 41 times [2022-02-11 01:36:14,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:36:14,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269810139] [2022-02-11 01:36:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:36:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:36:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:36:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:14,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:36:14,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269810139] [2022-02-11 01:36:14,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269810139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:36:14,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414430205] [2022-02-11 01:36:14,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:36:14,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:36:14,655 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) [2022-02-11 01:36:14,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 01:36:14,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:36:14,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:36:14,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:36:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:36:15,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:36:15,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:36:15,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:36:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:15,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:36:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:36:15,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:15,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-02-11 01:36:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:16,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414430205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:36:16,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:36:16,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 01:36:16,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248044296] [2022-02-11 01:36:16,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:36:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:36:16,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:36:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:36:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:36:16,608 INFO L87 Difference]: Start difference. First operand 3886 states and 14261 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:36:22,062 INFO L93 Difference]: Finished difference Result 7468 states and 24715 transitions. [2022-02-11 01:36:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 01:36:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:36:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:36:22,078 INFO L225 Difference]: With dead ends: 7468 [2022-02-11 01:36:22,078 INFO L226 Difference]: Without dead ends: 7324 [2022-02-11 01:36:22,079 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1647, Invalid=10125, Unknown=0, NotChecked=0, Total=11772 [2022-02-11 01:36:22,080 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 423 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:36:22,080 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 435 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:36:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2022-02-11 01:36:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 3965. [2022-02-11 01:36:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3965 states, 3964 states have (on average 3.66422805247225) internal successors, (14525), 3964 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3965 states to 3965 states and 14525 transitions. [2022-02-11 01:36:22,178 INFO L78 Accepts]: Start accepts. Automaton has 3965 states and 14525 transitions. Word has length 26 [2022-02-11 01:36:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:36:22,178 INFO L470 AbstractCegarLoop]: Abstraction has 3965 states and 14525 transitions. [2022-02-11 01:36:22,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3965 states and 14525 transitions. [2022-02-11 01:36:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:36:22,184 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:36:22,184 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:36:22,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 01:36:22,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-02-11 01:36:22,400 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:36:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:36:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash -384612468, now seen corresponding path program 42 times [2022-02-11 01:36:22,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:36:22,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601395610] [2022-02-11 01:36:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:36:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:36:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:36:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:22,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:36:22,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601395610] [2022-02-11 01:36:22,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601395610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:36:22,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694831666] [2022-02-11 01:36:22,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:36:22,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:22,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:36:22,537 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) [2022-02-11 01:36:22,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 01:36:22,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:36:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:36:22,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:36:22,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:36:22,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:22,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:36:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:23,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:36:23,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:36:23,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:36:23,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:23,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-02-11 01:36:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:24,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694831666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:36:24,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:36:24,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-11 01:36:24,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490055229] [2022-02-11 01:36:24,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:36:24,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:36:24,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:36:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:36:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:36:24,797 INFO L87 Difference]: Start difference. First operand 3965 states and 14525 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:36:33,700 INFO L93 Difference]: Finished difference Result 7287 states and 24926 transitions. [2022-02-11 01:36:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 01:36:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:36:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:36:33,716 INFO L225 Difference]: With dead ends: 7287 [2022-02-11 01:36:33,717 INFO L226 Difference]: Without dead ends: 7226 [2022-02-11 01:36:33,717 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1529, Invalid=7783, Unknown=0, NotChecked=0, Total=9312 [2022-02-11 01:36:33,718 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 433 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 3615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:36:33,718 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 704 Invalid, 3615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 01:36:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2022-02-11 01:36:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 4020. [2022-02-11 01:36:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4019 states have (on average 3.6588703657626276) internal successors, (14705), 4019 states have internal predecessors, (14705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 14705 transitions. [2022-02-11 01:36:33,813 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 14705 transitions. Word has length 26 [2022-02-11 01:36:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:36:33,813 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 14705 transitions. [2022-02-11 01:36:33,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 14705 transitions. [2022-02-11 01:36:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:36:33,819 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:36:33,819 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:36:33,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-11 01:36:34,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:34,032 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:36:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:36:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash -404580494, now seen corresponding path program 43 times [2022-02-11 01:36:34,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:36:34,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826915762] [2022-02-11 01:36:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:36:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:36:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:36:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:34,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:36:34,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826915762] [2022-02-11 01:36:34,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826915762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:36:34,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868532254] [2022-02-11 01:36:34,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:36:34,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:34,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:36:34,170 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) [2022-02-11 01:36:34,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 01:36:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:36:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:36:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:36:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:36:34,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:34,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:36:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:34,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:36:35,040 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:36:35,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 161 [2022-02-11 01:36:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:36,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868532254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:36:36,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:36:36,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 01:36:36,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077017467] [2022-02-11 01:36:36,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:36:36,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:36:36,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:36:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:36:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:36:36,453 INFO L87 Difference]: Start difference. First operand 4020 states and 14705 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) [2022-02-11 01:36:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:36:37,914 INFO L93 Difference]: Finished difference Result 5854 states and 20230 transitions. [2022-02-11 01:36:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:36:37,914 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 26 [2022-02-11 01:36:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:36:37,925 INFO L225 Difference]: With dead ends: 5854 [2022-02-11 01:36:37,925 INFO L226 Difference]: Without dead ends: 5804 [2022-02-11 01:36:37,926 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:36:37,926 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 195 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:36:37,926 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 277 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:36:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2022-02-11 01:36:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 4039. [2022-02-11 01:36:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4039 states, 4038 states have (on average 3.6594848935116393) internal successors, (14777), 4038 states have internal predecessors, (14777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 14777 transitions. [2022-02-11 01:36:37,997 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 14777 transitions. Word has length 26 [2022-02-11 01:36:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:36:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 4039 states and 14777 transitions. [2022-02-11 01:36:37,997 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) [2022-02-11 01:36:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 14777 transitions. [2022-02-11 01:36:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:36:38,003 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:36:38,003 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:36:38,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-11 01:36:38,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:38,218 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:36:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:36:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1484986580, now seen corresponding path program 44 times [2022-02-11 01:36:38,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:36:38,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401195619] [2022-02-11 01:36:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:36:38,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:36:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:36:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:38,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:36:38,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401195619] [2022-02-11 01:36:38,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401195619] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:36:38,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245624256] [2022-02-11 01:36:38,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:36:38,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:38,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:36:38,348 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) [2022-02-11 01:36:38,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 01:36:38,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:36:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:36:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:36:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:36:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:36:38,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:38,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:36:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:38,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:36:39,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:36:39,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:39,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 157 [2022-02-11 01:36:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:40,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245624256] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:36:40,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:36:40,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-11 01:36:40,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116884984] [2022-02-11 01:36:40,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:36:40,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:36:40,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:36:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:36:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:36:40,533 INFO L87 Difference]: Start difference. First operand 4039 states and 14777 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) [2022-02-11 01:36:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:36:42,663 INFO L93 Difference]: Finished difference Result 6491 states and 22205 transitions. [2022-02-11 01:36:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 01:36:42,663 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 26 [2022-02-11 01:36:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:36:42,678 INFO L225 Difference]: With dead ends: 6491 [2022-02-11 01:36:42,679 INFO L226 Difference]: Without dead ends: 6403 [2022-02-11 01:36:42,679 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:36:42,679 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 285 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:36:42,679 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 256 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 881 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-02-11 01:36:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2022-02-11 01:36:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 4095. [2022-02-11 01:36:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4095 states, 4094 states have (on average 3.657303370786517) internal successors, (14973), 4094 states have internal predecessors, (14973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:36:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 14973 transitions. [2022-02-11 01:36:42,793 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 14973 transitions. Word has length 26 [2022-02-11 01:36:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:36:42,793 INFO L470 AbstractCegarLoop]: Abstraction has 4095 states and 14973 transitions. [2022-02-11 01:36:42,793 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) [2022-02-11 01:36:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 14973 transitions. [2022-02-11 01:36:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:36:42,800 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:36:42,800 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:36:42,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-11 01:36:43,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:43,017 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:36:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:36:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash 367617680, now seen corresponding path program 45 times [2022-02-11 01:36:43,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:36:43,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800316663] [2022-02-11 01:36:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:36:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:36:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:36:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:43,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:36:43,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800316663] [2022-02-11 01:36:43,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800316663] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:36:43,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376702478] [2022-02-11 01:36:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:36:43,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:36:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:36:43,170 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) [2022-02-11 01:36:43,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 01:36:43,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:36:43,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:36:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:36:43,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:36:43,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:36:43,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:43,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:36:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:36:43,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:36:44,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:36:44,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 169 [2022-02-11 01:37:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:10,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376702478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:10,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:10,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:37:10,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065881466] [2022-02-11 01:37:10,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:10,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:37:10,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:37:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:37:10,382 INFO L87 Difference]: Start difference. First operand 4095 states and 14973 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) [2022-02-11 01:37:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:37:13,699 INFO L93 Difference]: Finished difference Result 6478 states and 22229 transitions. [2022-02-11 01:37:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:37:13,700 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 26 [2022-02-11 01:37:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:37:13,714 INFO L225 Difference]: With dead ends: 6478 [2022-02-11 01:37:13,714 INFO L226 Difference]: Without dead ends: 6407 [2022-02-11 01:37:13,714 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=733, Invalid=2927, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:37:13,715 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 364 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:37:13,715 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 307 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 818 Invalid, 0 Unknown, 424 Unchecked, 0.5s Time] [2022-02-11 01:37:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2022-02-11 01:37:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 4098. [2022-02-11 01:37:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 3.656822064925555) internal successors, (14982), 4097 states have internal predecessors, (14982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 14982 transitions. [2022-02-11 01:37:13,802 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 14982 transitions. Word has length 26 [2022-02-11 01:37:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:37:13,802 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 14982 transitions. [2022-02-11 01:37:13,802 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) [2022-02-11 01:37:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 14982 transitions. [2022-02-11 01:37:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:37:13,809 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:37:13,809 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:37:13,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-11 01:37:14,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:14,011 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:37:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:37:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 46 times [2022-02-11 01:37:14,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:37:14,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976476355] [2022-02-11 01:37:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:37:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:37:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:14,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:37:14,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976476355] [2022-02-11 01:37:14,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976476355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:37:14,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886158842] [2022-02-11 01:37:14,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:37:14,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:14,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:37:14,159 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) [2022-02-11 01:37:14,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-11 01:37:14,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:37:14,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:37:14,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:37:14,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:37:14,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:37:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:37:14,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:37:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:14,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:37:15,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:37:15,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:37:15,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:37:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:21,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886158842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:21,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:21,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:37:21,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402148499] [2022-02-11 01:37:21,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:21,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:37:21,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:37:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:37:21,187 INFO L87 Difference]: Start difference. First operand 4098 states and 14982 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) [2022-02-11 01:37:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:37:23,399 INFO L93 Difference]: Finished difference Result 6144 states and 21159 transitions. [2022-02-11 01:37:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:37:23,399 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 26 [2022-02-11 01:37:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:37:23,410 INFO L225 Difference]: With dead ends: 6144 [2022-02-11 01:37:23,410 INFO L226 Difference]: Without dead ends: 6054 [2022-02-11 01:37:23,411 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:37:23,411 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 222 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:37:23,411 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 295 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:37:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2022-02-11 01:37:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 4123. [2022-02-11 01:37:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 4122 states have (on average 3.6530810286268802) internal successors, (15058), 4122 states have internal predecessors, (15058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 15058 transitions. [2022-02-11 01:37:23,480 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 15058 transitions. Word has length 26 [2022-02-11 01:37:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:37:23,481 INFO L470 AbstractCegarLoop]: Abstraction has 4123 states and 15058 transitions. [2022-02-11 01:37:23,481 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) [2022-02-11 01:37:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 15058 transitions. [2022-02-11 01:37:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:37:23,486 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:37:23,486 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:37:23,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-11 01:37:23,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-11 01:37:23,699 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:37:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:37:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 47 times [2022-02-11 01:37:23,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:37:23,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416907165] [2022-02-11 01:37:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:37:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:37:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:23,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:37:23,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416907165] [2022-02-11 01:37:23,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416907165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:37:23,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958005990] [2022-02-11 01:37:23,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:37:23,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:23,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:37:23,834 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) [2022-02-11 01:37:23,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-11 01:37:23,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:37:23,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:37:23,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:37:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:37:24,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:37:24,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:37:24,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:37:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:24,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:37:24,801 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:37:24,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:37:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:27,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958005990] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:27,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:27,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:37:27,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82027392] [2022-02-11 01:37:27,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:27,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:37:27,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:37:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:37:27,547 INFO L87 Difference]: Start difference. First operand 4123 states and 15058 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:37:32,261 INFO L93 Difference]: Finished difference Result 7473 states and 25468 transitions. [2022-02-11 01:37:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:37:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:37:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:37:32,277 INFO L225 Difference]: With dead ends: 7473 [2022-02-11 01:37:32,277 INFO L226 Difference]: Without dead ends: 7428 [2022-02-11 01:37:32,278 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=976, Invalid=5830, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 01:37:32,279 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 292 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:37:32,279 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 433 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1843 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:37:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7428 states. [2022-02-11 01:37:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7428 to 4156. [2022-02-11 01:37:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4156 states, 4155 states have (on average 3.65439229843562) internal successors, (15184), 4155 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4156 states to 4156 states and 15184 transitions. [2022-02-11 01:37:32,386 INFO L78 Accepts]: Start accepts. Automaton has 4156 states and 15184 transitions. Word has length 26 [2022-02-11 01:37:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:37:32,386 INFO L470 AbstractCegarLoop]: Abstraction has 4156 states and 15184 transitions. [2022-02-11 01:37:32,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4156 states and 15184 transitions. [2022-02-11 01:37:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:37:32,392 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:37:32,392 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:37:32,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-11 01:37:32,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-02-11 01:37:32,594 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:37:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:37:32,595 INFO L85 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 48 times [2022-02-11 01:37:32,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:37:32,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857450990] [2022-02-11 01:37:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:37:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:37:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:32,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:37:32,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857450990] [2022-02-11 01:37:32,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857450990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:37:32,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79618232] [2022-02-11 01:37:32,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:37:32,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:32,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:37:32,713 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) [2022-02-11 01:37:32,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-11 01:37:32,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:37:32,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:37:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:37:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:37:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:37:33,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:37:33,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:37:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:33,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:37:33,529 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:37:33,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-02-11 01:37:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:36,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79618232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:36,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:36,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:37:36,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336522099] [2022-02-11 01:37:36,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:37:36,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:37:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:37:36,593 INFO L87 Difference]: Start difference. First operand 4156 states and 15184 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:37:39,615 INFO L93 Difference]: Finished difference Result 7094 states and 24232 transitions. [2022-02-11 01:37:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:37:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:37:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:37:39,630 INFO L225 Difference]: With dead ends: 7094 [2022-02-11 01:37:39,630 INFO L226 Difference]: Without dead ends: 7010 [2022-02-11 01:37:39,630 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=700, Invalid=3590, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:37:39,631 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 326 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:37:39,631 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 222 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 912 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-02-11 01:37:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7010 states. [2022-02-11 01:37:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7010 to 4198. [2022-02-11 01:37:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4197 states have (on average 3.6516559447224206) internal successors, (15326), 4197 states have internal predecessors, (15326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 15326 transitions. [2022-02-11 01:37:39,722 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 15326 transitions. Word has length 26 [2022-02-11 01:37:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:37:39,722 INFO L470 AbstractCegarLoop]: Abstraction has 4198 states and 15326 transitions. [2022-02-11 01:37:39,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 15326 transitions. [2022-02-11 01:37:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:37:39,729 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:37:39,729 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:37:39,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-11 01:37:39,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:39,944 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:37:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:37:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 49 times [2022-02-11 01:37:39,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:37:39,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701115674] [2022-02-11 01:37:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:37:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:37:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:40,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:37:40,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701115674] [2022-02-11 01:37:40,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701115674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:37:40,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958415804] [2022-02-11 01:37:40,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:37:40,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:37:40,136 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) [2022-02-11 01:37:40,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-11 01:37:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:37:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:37:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:37:40,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:37:40,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:37:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:40,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:37:41,343 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:37:41,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-02-11 01:37:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:43,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958415804] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:43,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:43,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:37:43,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143555495] [2022-02-11 01:37:43,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:43,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:37:43,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:37:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:37:43,369 INFO L87 Difference]: Start difference. First operand 4198 states and 15326 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:37:44,514 INFO L93 Difference]: Finished difference Result 6519 states and 22584 transitions. [2022-02-11 01:37:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 01:37:44,515 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:37:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:37:44,529 INFO L225 Difference]: With dead ends: 6519 [2022-02-11 01:37:44,529 INFO L226 Difference]: Without dead ends: 6474 [2022-02-11 01:37:44,529 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:37:44,529 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 173 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:37:44,530 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 244 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 824 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-02-11 01:37:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2022-02-11 01:37:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 4225. [2022-02-11 01:37:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4224 states have (on average 3.6503314393939394) internal successors, (15419), 4224 states have internal predecessors, (15419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 15419 transitions. [2022-02-11 01:37:44,638 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 15419 transitions. Word has length 26 [2022-02-11 01:37:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:37:44,638 INFO L470 AbstractCegarLoop]: Abstraction has 4225 states and 15419 transitions. [2022-02-11 01:37:44,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 15419 transitions. [2022-02-11 01:37:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:37:44,645 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:37:44,645 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:37:44,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-11 01:37:44,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:44,860 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:37:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:37:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 50 times [2022-02-11 01:37:44,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:37:44,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964820299] [2022-02-11 01:37:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:37:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:37:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:45,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:37:45,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964820299] [2022-02-11 01:37:45,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964820299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:37:45,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447149249] [2022-02-11 01:37:45,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:37:45,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:45,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:37:45,103 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) [2022-02-11 01:37:45,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-11 01:37:45,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:37:45,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:37:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:37:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:37:45,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:37:45,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:37:45,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:37:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:45,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:37:46,266 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:37:46,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:37:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:48,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447149249] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:48,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:48,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:37:48,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644252836] [2022-02-11 01:37:48,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:48,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:37:48,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:37:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:37:48,487 INFO L87 Difference]: Start difference. First operand 4225 states and 15419 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:37:50,827 INFO L93 Difference]: Finished difference Result 6602 states and 22875 transitions. [2022-02-11 01:37:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:37:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:37:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:37:50,841 INFO L225 Difference]: With dead ends: 6602 [2022-02-11 01:37:50,841 INFO L226 Difference]: Without dead ends: 6572 [2022-02-11 01:37:50,841 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=610, Invalid=3550, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 01:37:50,842 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 246 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:37:50,842 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 344 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:37:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2022-02-11 01:37:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 4255. [2022-02-11 01:37:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 3.6492712740949695) internal successors, (15524), 4254 states have internal predecessors, (15524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 15524 transitions. [2022-02-11 01:37:50,925 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 15524 transitions. Word has length 26 [2022-02-11 01:37:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:37:50,925 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 15524 transitions. [2022-02-11 01:37:50,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 15524 transitions. [2022-02-11 01:37:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:37:50,931 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:37:50,931 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:37:50,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-11 01:37:51,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-11 01:37:51,137 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:37:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:37:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 51 times [2022-02-11 01:37:51,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:37:51,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952932611] [2022-02-11 01:37:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:37:51,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:37:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:51,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:37:51,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952932611] [2022-02-11 01:37:51,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952932611] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:37:51,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747549882] [2022-02-11 01:37:51,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:37:51,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:51,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:37:51,297 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) [2022-02-11 01:37:51,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-11 01:37:51,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:37:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:37:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:37:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:37:51,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:37:51,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:37:51,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:37:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:51,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:37:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:37:52,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:37:52,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 157 [2022-02-11 01:37:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:54,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747549882] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:54,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:54,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:37:54,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098786766] [2022-02-11 01:37:54,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:54,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:37:54,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:37:54,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:37:54,913 INFO L87 Difference]: Start difference. First operand 4255 states and 15524 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) [2022-02-11 01:37:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:37:56,955 INFO L93 Difference]: Finished difference Result 6316 states and 21844 transitions. [2022-02-11 01:37:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:37:56,956 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 26 [2022-02-11 01:37:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:37:56,970 INFO L225 Difference]: With dead ends: 6316 [2022-02-11 01:37:56,970 INFO L226 Difference]: Without dead ends: 6240 [2022-02-11 01:37:56,970 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=489, Invalid=2163, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:37:56,970 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 232 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:37:56,970 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 303 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 768 Invalid, 0 Unknown, 370 Unchecked, 0.5s Time] [2022-02-11 01:37:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6240 states. [2022-02-11 01:37:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6240 to 4285. [2022-02-11 01:37:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 4284 states have (on average 3.6514939309056955) internal successors, (15643), 4284 states have internal predecessors, (15643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:37:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 15643 transitions. [2022-02-11 01:37:57,062 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 15643 transitions. Word has length 26 [2022-02-11 01:37:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:37:57,062 INFO L470 AbstractCegarLoop]: Abstraction has 4285 states and 15643 transitions. [2022-02-11 01:37:57,062 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) [2022-02-11 01:37:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 15643 transitions. [2022-02-11 01:37:57,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:37:57,069 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:37:57,069 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:37:57,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-11 01:37:57,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:57,283 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:37:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:37:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 52 times [2022-02-11 01:37:57,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:37:57,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657426018] [2022-02-11 01:37:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:37:57,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:37:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:37:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:57,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:37:57,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657426018] [2022-02-11 01:37:57,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657426018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:37:57,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154742518] [2022-02-11 01:37:57,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:37:57,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:37:57,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:37:57,544 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) [2022-02-11 01:37:57,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-11 01:37:57,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:37:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:37:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:37:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:37:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:37:57,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:37:57,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:37:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:58,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:37:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:37:58,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:37:58,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 157 [2022-02-11 01:37:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:37:59,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154742518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:37:59,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:37:59,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-11 01:37:59,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795114791] [2022-02-11 01:37:59,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:37:59,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:37:59,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:37:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:37:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:37:59,786 INFO L87 Difference]: Start difference. First operand 4285 states and 15643 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) [2022-02-11 01:38:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:01,527 INFO L93 Difference]: Finished difference Result 6424 states and 22271 transitions. [2022-02-11 01:38:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 01:38:01,527 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 26 [2022-02-11 01:38:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:01,541 INFO L225 Difference]: With dead ends: 6424 [2022-02-11 01:38:01,541 INFO L226 Difference]: Without dead ends: 6364 [2022-02-11 01:38:01,541 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=519, Invalid=2343, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 01:38:01,541 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:01,542 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 359 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 910 Invalid, 0 Unknown, 403 Unchecked, 0.4s Time] [2022-02-11 01:38:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6364 states. [2022-02-11 01:38:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6364 to 4347. [2022-02-11 01:38:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 3.651863782788771) internal successors, (15871), 4346 states have internal predecessors, (15871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 15871 transitions. [2022-02-11 01:38:01,647 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 15871 transitions. Word has length 26 [2022-02-11 01:38:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:01,647 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 15871 transitions. [2022-02-11 01:38:01,648 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) [2022-02-11 01:38:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 15871 transitions. [2022-02-11 01:38:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:01,655 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:01,655 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:01,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:01,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-11 01:38:01,871 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash 635089588, now seen corresponding path program 53 times [2022-02-11 01:38:01,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:01,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155282128] [2022-02-11 01:38:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:01,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:02,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:02,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155282128] [2022-02-11 01:38:02,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155282128] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:02,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245839136] [2022-02-11 01:38:02,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:38:02,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:02,143 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) [2022-02-11 01:38:02,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-11 01:38:02,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:38:02,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:38:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:38:02,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:02,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:38:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:03,140 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:38:03,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-02-11 01:38:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:05,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245839136] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:05,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:05,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:38:05,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743581830] [2022-02-11 01:38:05,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:05,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:38:05,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:38:05,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:38:05,134 INFO L87 Difference]: Start difference. First operand 4347 states and 15871 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:06,487 INFO L93 Difference]: Finished difference Result 6751 states and 23397 transitions. [2022-02-11 01:38:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 01:38:06,487 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:38:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:06,535 INFO L225 Difference]: With dead ends: 6751 [2022-02-11 01:38:06,535 INFO L226 Difference]: Without dead ends: 6706 [2022-02-11 01:38:06,535 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 01:38:06,536 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:06,536 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 348 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1239 Invalid, 0 Unknown, 253 Unchecked, 0.5s Time] [2022-02-11 01:38:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6706 states. [2022-02-11 01:38:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6706 to 4344. [2022-02-11 01:38:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4344 states, 4343 states have (on average 3.65162330186507) internal successors, (15859), 4343 states have internal predecessors, (15859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 15859 transitions. [2022-02-11 01:38:06,624 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 15859 transitions. Word has length 26 [2022-02-11 01:38:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:06,624 INFO L470 AbstractCegarLoop]: Abstraction has 4344 states and 15859 transitions. [2022-02-11 01:38:06,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 15859 transitions. [2022-02-11 01:38:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:06,631 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:06,631 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:06,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:06,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-11 01:38:06,843 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1631433958, now seen corresponding path program 54 times [2022-02-11 01:38:06,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:06,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192057] [2022-02-11 01:38:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:07,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:07,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192057] [2022-02-11 01:38:07,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:07,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677002230] [2022-02-11 01:38:07,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:38:07,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:07,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:07,151 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) [2022-02-11 01:38:07,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-11 01:38:07,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:38:07,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:38:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:07,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:38:07,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:38:07,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:38:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:07,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:07,944 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:38:07,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-02-11 01:38:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:10,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677002230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:10,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:10,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:38:10,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751453480] [2022-02-11 01:38:10,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:10,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:38:10,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:38:10,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:38:10,048 INFO L87 Difference]: Start difference. First operand 4344 states and 15859 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:13,205 INFO L93 Difference]: Finished difference Result 7020 states and 24201 transitions. [2022-02-11 01:38:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:38:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:38:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:13,222 INFO L225 Difference]: With dead ends: 7020 [2022-02-11 01:38:13,222 INFO L226 Difference]: Without dead ends: 6980 [2022-02-11 01:38:13,223 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=615, Invalid=3167, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 01:38:13,223 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 253 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:13,223 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 368 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:38:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6980 states. [2022-02-11 01:38:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6980 to 4348. [2022-02-11 01:38:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 3.6514837819185644) internal successors, (15873), 4347 states have internal predecessors, (15873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 15873 transitions. [2022-02-11 01:38:13,319 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 15873 transitions. Word has length 26 [2022-02-11 01:38:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:13,320 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 15873 transitions. [2022-02-11 01:38:13,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 15873 transitions. [2022-02-11 01:38:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:13,327 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:13,327 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:13,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:13,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-11 01:38:13,540 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 49 times [2022-02-11 01:38:13,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:13,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101337598] [2022-02-11 01:38:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:13,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:13,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101337598] [2022-02-11 01:38:13,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101337598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:13,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550502966] [2022-02-11 01:38:13,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:38:13,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:13,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:13,702 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) [2022-02-11 01:38:13,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-11 01:38:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:38:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:14,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:38:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:14,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:14,515 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:38:14,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:38:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:15,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550502966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:15,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:15,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-02-11 01:38:15,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915567845] [2022-02-11 01:38:15,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:15,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:38:15,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:38:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:38:15,013 INFO L87 Difference]: Start difference. First operand 4348 states and 15873 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:15,920 INFO L93 Difference]: Finished difference Result 5469 states and 19033 transitions. [2022-02-11 01:38:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:38:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:38:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:15,933 INFO L225 Difference]: With dead ends: 5469 [2022-02-11 01:38:15,933 INFO L226 Difference]: Without dead ends: 5439 [2022-02-11 01:38:15,933 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 01:38:15,933 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 241 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:15,933 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 266 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:38:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2022-02-11 01:38:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 4364. [2022-02-11 01:38:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 3.649553059821224) internal successors, (15923), 4363 states have internal predecessors, (15923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 15923 transitions. [2022-02-11 01:38:16,022 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 15923 transitions. Word has length 26 [2022-02-11 01:38:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:16,022 INFO L470 AbstractCegarLoop]: Abstraction has 4364 states and 15923 transitions. [2022-02-11 01:38:16,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 15923 transitions. [2022-02-11 01:38:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:16,029 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:16,029 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:16,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-11 01:38:16,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:16,236 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 50 times [2022-02-11 01:38:16,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:16,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960276256] [2022-02-11 01:38:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:16,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:16,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960276256] [2022-02-11 01:38:16,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960276256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:16,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268091355] [2022-02-11 01:38:16,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:38:16,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:16,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:16,436 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) [2022-02-11 01:38:16,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-11 01:38:16,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:38:16,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:38:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:16,785 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 109 treesize of output 75 [2022-02-11 01:38:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:16,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:17,079 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:38:17,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-02-11 01:38:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:17,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268091355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:17,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:17,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-02-11 01:38:17,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216603390] [2022-02-11 01:38:17,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:17,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:38:17,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:38:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:38:17,570 INFO L87 Difference]: Start difference. First operand 4364 states and 15923 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-02-11 01:38:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:19,124 INFO L93 Difference]: Finished difference Result 5741 states and 20337 transitions. [2022-02-11 01:38:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 01:38:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 26 [2022-02-11 01:38:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:19,137 INFO L225 Difference]: With dead ends: 5741 [2022-02-11 01:38:19,137 INFO L226 Difference]: Without dead ends: 5665 [2022-02-11 01:38:19,138 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 01:38:19,138 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:19,138 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 290 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:38:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-02-11 01:38:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 4378. [2022-02-11 01:38:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 3.6440484350011424) internal successors, (15950), 4377 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 15950 transitions. [2022-02-11 01:38:19,220 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 15950 transitions. Word has length 26 [2022-02-11 01:38:19,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:19,220 INFO L470 AbstractCegarLoop]: Abstraction has 4378 states and 15950 transitions. [2022-02-11 01:38:19,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-02-11 01:38:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 15950 transitions. [2022-02-11 01:38:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:19,228 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:19,228 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:19,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:19,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:19,444 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 51 times [2022-02-11 01:38:19,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:19,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546961314] [2022-02-11 01:38:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:19,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:19,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546961314] [2022-02-11 01:38:19,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546961314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:19,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139354538] [2022-02-11 01:38:19,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:38:19,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:19,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:19,666 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) [2022-02-11 01:38:19,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-11 01:38:19,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:38:19,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:38:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:19,907 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 109 treesize of output 75 [2022-02-11 01:38:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:19,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:20,246 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:38:20,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:38:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:20,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139354538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:20,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:20,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 01:38:20,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595140932] [2022-02-11 01:38:20,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:38:20,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:38:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:38:20,594 INFO L87 Difference]: Start difference. First operand 4378 states and 15950 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2022-02-11 01:38:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:21,486 INFO L93 Difference]: Finished difference Result 5750 states and 20379 transitions. [2022-02-11 01:38:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 01:38:21,487 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 26 [2022-02-11 01:38:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:21,499 INFO L225 Difference]: With dead ends: 5750 [2022-02-11 01:38:21,500 INFO L226 Difference]: Without dead ends: 5720 [2022-02-11 01:38:21,500 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:38:21,500 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:21,500 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 327 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:38:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2022-02-11 01:38:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 4396. [2022-02-11 01:38:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4396 states, 4395 states have (on average 3.6439135381114904) internal successors, (16015), 4395 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4396 states to 4396 states and 16015 transitions. [2022-02-11 01:38:21,580 INFO L78 Accepts]: Start accepts. Automaton has 4396 states and 16015 transitions. Word has length 26 [2022-02-11 01:38:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:21,580 INFO L470 AbstractCegarLoop]: Abstraction has 4396 states and 16015 transitions. [2022-02-11 01:38:21,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2022-02-11 01:38:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4396 states and 16015 transitions. [2022-02-11 01:38:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:21,587 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:21,588 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:21,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:21,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-11 01:38:21,803 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:21,803 INFO L85 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 55 times [2022-02-11 01:38:21,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:21,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465197228] [2022-02-11 01:38:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:21,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:21,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:21,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465197228] [2022-02-11 01:38:21,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465197228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:21,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562699080] [2022-02-11 01:38:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:38:21,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:21,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:21,995 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) [2022-02-11 01:38:21,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-11 01:38:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:22,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:38:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:22,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:38:22,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:22,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:38:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:22,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:22,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:22,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:38:22,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-02-11 01:38:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:25,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562699080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:25,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:25,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:38:25,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359401995] [2022-02-11 01:38:25,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:25,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:38:25,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:25,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:38:25,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:38:25,225 INFO L87 Difference]: Start difference. First operand 4396 states and 16015 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) [2022-02-11 01:38:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:30,040 INFO L93 Difference]: Finished difference Result 8554 states and 28432 transitions. [2022-02-11 01:38:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:38:30,041 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 26 [2022-02-11 01:38:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:30,058 INFO L225 Difference]: With dead ends: 8554 [2022-02-11 01:38:30,058 INFO L226 Difference]: Without dead ends: 8524 [2022-02-11 01:38:30,058 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1138, Invalid=3974, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:38:30,059 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 538 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:30,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 404 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1356 Invalid, 0 Unknown, 198 Unchecked, 0.9s Time] [2022-02-11 01:38:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8524 states. [2022-02-11 01:38:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8524 to 4520. [2022-02-11 01:38:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.643062624474441) internal successors, (16463), 4519 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16463 transitions. [2022-02-11 01:38:30,166 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16463 transitions. Word has length 26 [2022-02-11 01:38:30,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:30,167 INFO L470 AbstractCegarLoop]: Abstraction has 4520 states and 16463 transitions. [2022-02-11 01:38:30,167 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) [2022-02-11 01:38:30,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16463 transitions. [2022-02-11 01:38:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:30,174 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:30,174 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:30,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:30,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:30,387 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:30,387 INFO L85 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 52 times [2022-02-11 01:38:30,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:30,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943973958] [2022-02-11 01:38:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:30,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:30,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:30,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943973958] [2022-02-11 01:38:30,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943973958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:30,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708632699] [2022-02-11 01:38:30,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:38:30,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:30,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:30,487 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) [2022-02-11 01:38:30,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-11 01:38:30,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:38:30,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:38:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:31,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:38:31,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:38:31,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:31,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:31,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:38:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:31,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:31,632 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:38:31,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:38:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:32,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708632699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:32,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:32,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-11 01:38:32,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316267134] [2022-02-11 01:38:32,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:32,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:38:32,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:32,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:38:32,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:38:32,098 INFO L87 Difference]: Start difference. First operand 4520 states and 16463 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:37,133 INFO L93 Difference]: Finished difference Result 7276 states and 24606 transitions. [2022-02-11 01:38:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-11 01:38:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:38:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:37,149 INFO L225 Difference]: With dead ends: 7276 [2022-02-11 01:38:37,149 INFO L226 Difference]: Without dead ends: 7246 [2022-02-11 01:38:37,150 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1746, Invalid=8966, Unknown=0, NotChecked=0, Total=10712 [2022-02-11 01:38:37,150 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 400 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:37,150 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 506 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:38:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2022-02-11 01:38:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 4596. [2022-02-11 01:38:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4596 states, 4595 states have (on average 3.647442872687704) internal successors, (16760), 4595 states have internal predecessors, (16760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4596 states to 4596 states and 16760 transitions. [2022-02-11 01:38:37,245 INFO L78 Accepts]: Start accepts. Automaton has 4596 states and 16760 transitions. Word has length 26 [2022-02-11 01:38:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:37,245 INFO L470 AbstractCegarLoop]: Abstraction has 4596 states and 16760 transitions. [2022-02-11 01:38:37,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4596 states and 16760 transitions. [2022-02-11 01:38:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:37,252 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:37,253 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:37,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:37,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:37,466 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:37,467 INFO L85 PathProgramCache]: Analyzing trace with hash 889461688, now seen corresponding path program 56 times [2022-02-11 01:38:37,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:37,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014508346] [2022-02-11 01:38:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:37,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:37,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014508346] [2022-02-11 01:38:37,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014508346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:37,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237404614] [2022-02-11 01:38:37,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:38:37,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:37,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:37,810 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) [2022-02-11 01:38:37,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-11 01:38:37,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:38:37,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:38:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:38,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:38:38,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:38:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:39,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:39,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:39,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:39,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:38:39,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-02-11 01:38:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:40,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237404614] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:40,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:40,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 01:38:40,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273303033] [2022-02-11 01:38:40,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:40,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:38:40,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:38:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:38:40,313 INFO L87 Difference]: Start difference. First operand 4596 states and 16760 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:48,842 INFO L93 Difference]: Finished difference Result 11593 states and 39208 transitions. [2022-02-11 01:38:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-11 01:38:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:38:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:48,868 INFO L225 Difference]: With dead ends: 11593 [2022-02-11 01:38:48,868 INFO L226 Difference]: Without dead ends: 11548 [2022-02-11 01:38:48,869 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6345 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2011, Invalid=15019, Unknown=0, NotChecked=0, Total=17030 [2022-02-11 01:38:48,869 INFO L934 BasicCegarLoop]: 63 mSDtfsCounter, 506 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 722 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:48,869 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 979 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1968 Invalid, 0 Unknown, 722 Unchecked, 1.0s Time] [2022-02-11 01:38:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11548 states. [2022-02-11 01:38:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11548 to 4613. [2022-02-11 01:38:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 3.6513443191673893) internal successors, (16840), 4612 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 16840 transitions. [2022-02-11 01:38:49,027 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 16840 transitions. Word has length 26 [2022-02-11 01:38:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:49,027 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 16840 transitions. [2022-02-11 01:38:49,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 16840 transitions. [2022-02-11 01:38:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:49,035 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:49,035 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:49,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:49,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:49,251 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -604446034, now seen corresponding path program 57 times [2022-02-11 01:38:49,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:49,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137909934] [2022-02-11 01:38:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:49,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:49,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137909934] [2022-02-11 01:38:49,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137909934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:49,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654946985] [2022-02-11 01:38:49,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:38:49,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:49,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:49,506 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) [2022-02-11 01:38:49,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-11 01:38:49,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:38:49,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:38:49,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:38:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:50,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:38:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:50,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:50,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:50,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:38:50,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-02-11 01:38:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:54,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654946985] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:38:54,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:38:54,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:38:54,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685568111] [2022-02-11 01:38:54,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:38:54,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:38:54,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:38:54,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:38:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:38:54,510 INFO L87 Difference]: Start difference. First operand 4613 states and 16840 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) [2022-02-11 01:38:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:38:57,582 INFO L93 Difference]: Finished difference Result 8544 states and 28609 transitions. [2022-02-11 01:38:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:38:57,582 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 26 [2022-02-11 01:38:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:38:57,601 INFO L225 Difference]: With dead ends: 8544 [2022-02-11 01:38:57,601 INFO L226 Difference]: Without dead ends: 8514 [2022-02-11 01:38:57,602 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=711, Invalid=2711, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:38:57,602 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 392 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:38:57,602 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 357 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1112 Invalid, 0 Unknown, 248 Unchecked, 0.7s Time] [2022-02-11 01:38:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8514 states. [2022-02-11 01:38:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8514 to 4586. [2022-02-11 01:38:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 3.6523446019629224) internal successors, (16746), 4585 states have internal predecessors, (16746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:38:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 16746 transitions. [2022-02-11 01:38:57,728 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 16746 transitions. Word has length 26 [2022-02-11 01:38:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:38:57,728 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 16746 transitions. [2022-02-11 01:38:57,728 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) [2022-02-11 01:38:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 16746 transitions. [2022-02-11 01:38:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:38:57,736 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:38:57,736 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:38:57,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-11 01:38:57,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-11 01:38:57,951 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:38:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:38:57,953 INFO L85 PathProgramCache]: Analyzing trace with hash -161119012, now seen corresponding path program 58 times [2022-02-11 01:38:57,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:38:57,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169940518] [2022-02-11 01:38:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:38:57,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:38:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:38:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:58,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:38:58,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169940518] [2022-02-11 01:38:58,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169940518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:38:58,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117129138] [2022-02-11 01:38:58,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:38:58,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:38:58,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:38:58,316 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) [2022-02-11 01:38:58,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-11 01:38:58,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:38:58,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:38:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:38:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:38:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:38:58,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:38:58,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:38:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:38:58,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:38:59,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:38:59,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:38:59,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-02-11 01:39:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:01,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117129138] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:39:01,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:39:01,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:39:01,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203842823] [2022-02-11 01:39:01,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:39:01,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:39:01,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:39:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:39:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:39:01,195 INFO L87 Difference]: Start difference. First operand 4586 states and 16746 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) [2022-02-11 01:39:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:39:05,361 INFO L93 Difference]: Finished difference Result 8762 states and 29387 transitions. [2022-02-11 01:39:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:39:05,361 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 26 [2022-02-11 01:39:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:39:05,382 INFO L225 Difference]: With dead ends: 8762 [2022-02-11 01:39:05,382 INFO L226 Difference]: Without dead ends: 8732 [2022-02-11 01:39:05,383 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1195, Invalid=4355, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 01:39:05,383 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 441 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:39:05,383 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 617 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1887 Invalid, 0 Unknown, 287 Unchecked, 0.9s Time] [2022-02-11 01:39:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8732 states. [2022-02-11 01:39:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8732 to 4602. [2022-02-11 01:39:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 3.649858726363834) internal successors, (16793), 4601 states have internal predecessors, (16793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 16793 transitions. [2022-02-11 01:39:05,500 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 16793 transitions. Word has length 26 [2022-02-11 01:39:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:39:05,500 INFO L470 AbstractCegarLoop]: Abstraction has 4602 states and 16793 transitions. [2022-02-11 01:39:05,500 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) [2022-02-11 01:39:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 16793 transitions. [2022-02-11 01:39:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:39:05,508 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:39:05,508 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:39:05,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-11 01:39:05,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-11 01:39:05,724 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:39:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:39:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1075966400, now seen corresponding path program 53 times [2022-02-11 01:39:05,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:39:05,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842372787] [2022-02-11 01:39:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:39:05,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:39:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:05,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:39:05,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842372787] [2022-02-11 01:39:05,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842372787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:39:05,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771457583] [2022-02-11 01:39:05,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:39:05,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:05,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:39:05,885 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) [2022-02-11 01:39:05,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-11 01:39:05,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:39:05,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:39:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:39:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:39:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:06,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:06,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:06,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:39:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:06,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:39:06,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:06,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:06,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-02-11 01:39:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:07,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771457583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:39:07,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:39:07,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 01:39:07,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453923330] [2022-02-11 01:39:07,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:39:07,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 01:39:07,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:39:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 01:39:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:39:07,077 INFO L87 Difference]: Start difference. First operand 4602 states and 16793 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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) [2022-02-11 01:39:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:39:08,792 INFO L93 Difference]: Finished difference Result 7010 states and 24117 transitions. [2022-02-11 01:39:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:39:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 26 [2022-02-11 01:39:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:39:08,808 INFO L225 Difference]: With dead ends: 7010 [2022-02-11 01:39:08,809 INFO L226 Difference]: Without dead ends: 6966 [2022-02-11 01:39:08,809 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=430, Invalid=1922, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:39:08,809 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 285 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:39:08,809 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 335 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:39:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6966 states. [2022-02-11 01:39:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 4694. [2022-02-11 01:39:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4693 states have (on average 3.645642446196463) internal successors, (17109), 4693 states have internal predecessors, (17109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 17109 transitions. [2022-02-11 01:39:08,936 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 17109 transitions. Word has length 26 [2022-02-11 01:39:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:39:08,936 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 17109 transitions. [2022-02-11 01:39:08,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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) [2022-02-11 01:39:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 17109 transitions. [2022-02-11 01:39:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:39:08,944 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:39:08,944 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:39:08,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-11 01:39:09,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-11 01:39:09,159 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:39:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:39:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1385352244, now seen corresponding path program 54 times [2022-02-11 01:39:09,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:39:09,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237876316] [2022-02-11 01:39:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:39:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:39:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:09,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:39:09,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237876316] [2022-02-11 01:39:09,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237876316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:39:09,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793355106] [2022-02-11 01:39:09,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:39:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:39:09,297 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) [2022-02-11 01:39:09,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-11 01:39:09,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:39:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:39:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:39:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:39:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:09,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:09,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-02-11 01:39:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:09,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:39:10,173 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:39:10,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:39:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:10,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793355106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:39:10,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:39:10,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-02-11 01:39:10,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199009940] [2022-02-11 01:39:10,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:39:10,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:39:10,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:39:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:39:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:39:10,635 INFO L87 Difference]: Start difference. First operand 4694 states and 17109 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:39:17,266 INFO L93 Difference]: Finished difference Result 9428 states and 31738 transitions. [2022-02-11 01:39:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-11 01:39:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:39:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:39:17,287 INFO L225 Difference]: With dead ends: 9428 [2022-02-11 01:39:17,288 INFO L226 Difference]: Without dead ends: 9391 [2022-02-11 01:39:17,289 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6044 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2694, Invalid=13562, Unknown=0, NotChecked=0, Total=16256 [2022-02-11 01:39:17,289 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 503 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:39:17,289 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 693 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:39:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2022-02-11 01:39:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 4698. [2022-02-11 01:39:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 3.6465829252714497) internal successors, (17128), 4697 states have internal predecessors, (17128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 17128 transitions. [2022-02-11 01:39:17,414 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 17128 transitions. Word has length 26 [2022-02-11 01:39:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:39:17,414 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 17128 transitions. [2022-02-11 01:39:17,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 17128 transitions. [2022-02-11 01:39:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:39:17,422 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:39:17,422 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:39:17,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-11 01:39:17,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-11 01:39:17,635 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:39:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:39:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 59 times [2022-02-11 01:39:17,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:39:17,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267209819] [2022-02-11 01:39:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:39:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:39:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:17,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:39:17,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267209819] [2022-02-11 01:39:17,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267209819] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:39:17,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437803021] [2022-02-11 01:39:17,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:39:17,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:17,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:39:17,937 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) [2022-02-11 01:39:17,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-11 01:39:17,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:39:17,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:39:17,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:39:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:39:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:18,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:18,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:39:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:18,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:39:18,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:18,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:18,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-02-11 01:39:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:21,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437803021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:39:21,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:39:21,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:39:21,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199056599] [2022-02-11 01:39:21,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:39:21,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:39:21,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:39:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:39:21,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:39:21,346 INFO L87 Difference]: Start difference. First operand 4698 states and 17128 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) [2022-02-11 01:39:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:39:25,170 INFO L93 Difference]: Finished difference Result 9669 states and 33064 transitions. [2022-02-11 01:39:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 01:39:25,170 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 26 [2022-02-11 01:39:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:39:25,195 INFO L225 Difference]: With dead ends: 9669 [2022-02-11 01:39:25,195 INFO L226 Difference]: Without dead ends: 9594 [2022-02-11 01:39:25,196 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=915, Invalid=5405, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:39:25,196 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 368 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:39:25,196 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 409 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1066 Invalid, 0 Unknown, 506 Unchecked, 0.5s Time] [2022-02-11 01:39:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9594 states. [2022-02-11 01:39:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9594 to 4721. [2022-02-11 01:39:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 3.648728813559322) internal successors, (17222), 4720 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 17222 transitions. [2022-02-11 01:39:25,318 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 17222 transitions. Word has length 26 [2022-02-11 01:39:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:39:25,318 INFO L470 AbstractCegarLoop]: Abstraction has 4721 states and 17222 transitions. [2022-02-11 01:39:25,318 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) [2022-02-11 01:39:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 17222 transitions. [2022-02-11 01:39:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:39:25,326 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:39:25,326 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:39:25,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-11 01:39:25,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:25,541 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:39:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:39:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1152382328, now seen corresponding path program 60 times [2022-02-11 01:39:25,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:39:25,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943463277] [2022-02-11 01:39:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:39:25,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:39:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:25,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:39:25,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943463277] [2022-02-11 01:39:25,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943463277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:39:25,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188670109] [2022-02-11 01:39:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:39:25,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:25,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:39:25,797 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) [2022-02-11 01:39:25,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-11 01:39:25,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:39:25,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:39:25,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:39:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:39:26,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:26,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:26,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:39:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:26,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:39:26,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:26,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:26,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-02-11 01:39:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:28,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188670109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:39:28,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:39:28,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:39:28,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770854910] [2022-02-11 01:39:28,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:39:28,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:39:28,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:39:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:39:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:39:28,923 INFO L87 Difference]: Start difference. First operand 4721 states and 17222 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) [2022-02-11 01:39:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:39:32,810 INFO L93 Difference]: Finished difference Result 8171 states and 27748 transitions. [2022-02-11 01:39:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:39:32,810 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 26 [2022-02-11 01:39:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:39:32,830 INFO L225 Difference]: With dead ends: 8171 [2022-02-11 01:39:32,830 INFO L226 Difference]: Without dead ends: 8135 [2022-02-11 01:39:32,831 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=823, Invalid=3599, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 01:39:32,831 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 335 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:39:32,831 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 463 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1450 Invalid, 0 Unknown, 242 Unchecked, 0.9s Time] [2022-02-11 01:39:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8135 states. [2022-02-11 01:39:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8135 to 4759. [2022-02-11 01:39:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4759 states, 4758 states have (on average 3.644598570828079) internal successors, (17341), 4758 states have internal predecessors, (17341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 17341 transitions. [2022-02-11 01:39:32,957 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 17341 transitions. Word has length 26 [2022-02-11 01:39:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:39:32,957 INFO L470 AbstractCegarLoop]: Abstraction has 4759 states and 17341 transitions. [2022-02-11 01:39:32,958 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) [2022-02-11 01:39:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 17341 transitions. [2022-02-11 01:39:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:39:32,965 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:39:32,965 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:39:32,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-11 01:39:33,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:33,181 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:39:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:39:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1131645800, now seen corresponding path program 61 times [2022-02-11 01:39:33,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:39:33,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524977694] [2022-02-11 01:39:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:39:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:39:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:33,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:39:33,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524977694] [2022-02-11 01:39:33,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524977694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:39:33,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562001762] [2022-02-11 01:39:33,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:39:33,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:33,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:39:33,527 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) [2022-02-11 01:39:33,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-11 01:39:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:33,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:39:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:39:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:34,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:34,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 99 [2022-02-11 01:39:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:34,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:39:34,785 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:39:34,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-02-11 01:39:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:38,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562001762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:39:38,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:39:38,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:39:38,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418180657] [2022-02-11 01:39:38,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:39:38,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:39:38,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:39:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:39:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:39:38,741 INFO L87 Difference]: Start difference. First operand 4759 states and 17341 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:39:44,787 INFO L93 Difference]: Finished difference Result 8518 states and 28909 transitions. [2022-02-11 01:39:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 01:39:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:39:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:39:44,826 INFO L225 Difference]: With dead ends: 8518 [2022-02-11 01:39:44,826 INFO L226 Difference]: Without dead ends: 8488 [2022-02-11 01:39:44,826 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1010, Invalid=6130, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 01:39:44,826 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 385 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:39:44,826 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 512 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:39:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8488 states. [2022-02-11 01:39:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8488 to 4746. [2022-02-11 01:39:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.644678609062171) internal successors, (17294), 4745 states have internal predecessors, (17294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 17294 transitions. [2022-02-11 01:39:44,920 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 17294 transitions. Word has length 26 [2022-02-11 01:39:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:39:44,921 INFO L470 AbstractCegarLoop]: Abstraction has 4746 states and 17294 transitions. [2022-02-11 01:39:44,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 17294 transitions. [2022-02-11 01:39:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:39:44,928 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:39:44,928 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:39:44,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-11 01:39:45,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-11 01:39:45,143 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:39:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:39:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 62 times [2022-02-11 01:39:45,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:39:45,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431384673] [2022-02-11 01:39:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:39:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:39:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:45,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:39:45,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431384673] [2022-02-11 01:39:45,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431384673] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:39:45,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802083121] [2022-02-11 01:39:45,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:39:45,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:45,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:39:45,409 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) [2022-02-11 01:39:45,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-11 01:39:45,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:39:45,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:39:45,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:39:45,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:39:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:39:45,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:45,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:39:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:47,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:39:48,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:48,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:39:48,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:48,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-02-11 01:39:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:49,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802083121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:39:49,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:39:49,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 01:39:49,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013159897] [2022-02-11 01:39:49,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:39:49,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:39:49,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:39:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:39:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:39:49,100 INFO L87 Difference]: Start difference. First operand 4746 states and 17294 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:39:57,508 INFO L93 Difference]: Finished difference Result 11434 states and 39654 transitions. [2022-02-11 01:39:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-11 01:39:57,508 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:39:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:39:57,535 INFO L225 Difference]: With dead ends: 11434 [2022-02-11 01:39:57,536 INFO L226 Difference]: Without dead ends: 11390 [2022-02-11 01:39:57,536 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5264 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1967, Invalid=12795, Unknown=0, NotChecked=0, Total=14762 [2022-02-11 01:39:57,537 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 503 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1609 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:39:57,537 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 655 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1342 Invalid, 0 Unknown, 1609 Unchecked, 0.7s Time] [2022-02-11 01:39:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11390 states. [2022-02-11 01:39:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11390 to 4801. [2022-02-11 01:39:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 3.655625) internal successors, (17547), 4800 states have internal predecessors, (17547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 17547 transitions. [2022-02-11 01:39:57,705 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 17547 transitions. Word has length 26 [2022-02-11 01:39:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:39:57,705 INFO L470 AbstractCegarLoop]: Abstraction has 4801 states and 17547 transitions. [2022-02-11 01:39:57,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:39:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 17547 transitions. [2022-02-11 01:39:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:39:57,713 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:39:57,713 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:39:57,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-11 01:39:57,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:57,929 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:39:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:39:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash 769349170, now seen corresponding path program 63 times [2022-02-11 01:39:57,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:39:57,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715861222] [2022-02-11 01:39:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:39:57,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:39:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:39:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:58,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:39:58,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715861222] [2022-02-11 01:39:58,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715861222] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:39:58,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77669727] [2022-02-11 01:39:58,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:39:58,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:39:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:39:58,195 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) [2022-02-11 01:39:58,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-11 01:39:58,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:39:58,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:39:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:39:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:39:58,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:39:58,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 99 [2022-02-11 01:39:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:39:59,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:40:00,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:40:00,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-02-11 01:40:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:05,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77669727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:40:05,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:40:05,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-02-11 01:40:05,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777172846] [2022-02-11 01:40:05,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:40:05,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:40:05,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:40:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:40:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:40:05,389 INFO L87 Difference]: Start difference. First operand 4801 states and 17547 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) [2022-02-11 01:40:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:40:09,164 INFO L93 Difference]: Finished difference Result 8206 states and 28770 transitions. [2022-02-11 01:40:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:40:09,164 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 26 [2022-02-11 01:40:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:40:09,179 INFO L225 Difference]: With dead ends: 8206 [2022-02-11 01:40:09,179 INFO L226 Difference]: Without dead ends: 8156 [2022-02-11 01:40:09,179 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:40:09,179 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 294 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1532 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:40:09,179 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 463 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 747 Invalid, 0 Unknown, 1532 Unchecked, 0.4s Time] [2022-02-11 01:40:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2022-02-11 01:40:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 4799. [2022-02-11 01:40:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.6552730304293455) internal successors, (17538), 4798 states have internal predecessors, (17538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 17538 transitions. [2022-02-11 01:40:09,271 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 17538 transitions. Word has length 26 [2022-02-11 01:40:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:40:09,271 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 17538 transitions. [2022-02-11 01:40:09,271 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) [2022-02-11 01:40:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 17538 transitions. [2022-02-11 01:40:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:40:09,278 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:40:09,278 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:40:09,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-11 01:40:09,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:09,493 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:40:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:40:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash -332212152, now seen corresponding path program 64 times [2022-02-11 01:40:09,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:40:09,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900387674] [2022-02-11 01:40:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:40:09,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:40:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:09,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:40:09,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900387674] [2022-02-11 01:40:09,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900387674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:40:09,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528771171] [2022-02-11 01:40:09,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:40:09,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:09,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:40:09,803 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) [2022-02-11 01:40:09,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-11 01:40:09,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:40:09,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:40:09,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:40:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:40:10,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:40:10,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:10,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 76 [2022-02-11 01:40:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:10,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:40:11,117 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:40:11,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 263 treesize of output 193 [2022-02-11 01:40:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:16,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528771171] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:40:16,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:40:16,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 01:40:16,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440178383] [2022-02-11 01:40:16,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:40:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:40:16,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:40:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:40:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:40:16,422 INFO L87 Difference]: Start difference. First operand 4799 states and 17538 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) [2022-02-11 01:40:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:40:19,045 INFO L93 Difference]: Finished difference Result 7128 states and 24464 transitions. [2022-02-11 01:40:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:40:19,045 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 26 [2022-02-11 01:40:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:40:19,061 INFO L225 Difference]: With dead ends: 7128 [2022-02-11 01:40:19,061 INFO L226 Difference]: Without dead ends: 7098 [2022-02-11 01:40:19,061 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:40:19,062 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 210 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:40:19,062 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 409 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 932 Invalid, 0 Unknown, 59 Unchecked, 0.6s Time] [2022-02-11 01:40:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7098 states. [2022-02-11 01:40:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7098 to 4819. [2022-02-11 01:40:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 3.654005811540058) internal successors, (17605), 4818 states have internal predecessors, (17605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 17605 transitions. [2022-02-11 01:40:19,161 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 17605 transitions. Word has length 26 [2022-02-11 01:40:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:40:19,161 INFO L470 AbstractCegarLoop]: Abstraction has 4819 states and 17605 transitions. [2022-02-11 01:40:19,161 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) [2022-02-11 01:40:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 17605 transitions. [2022-02-11 01:40:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:40:19,169 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:40:19,169 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:40:19,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-11 01:40:19,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:19,382 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:40:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:40:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1366685828, now seen corresponding path program 65 times [2022-02-11 01:40:19,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:40:19,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267308602] [2022-02-11 01:40:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:40:19,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:40:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:19,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:40:19,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267308602] [2022-02-11 01:40:19,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267308602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:40:19,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744931287] [2022-02-11 01:40:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:40:19,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:40:19,748 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) [2022-02-11 01:40:19,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-11 01:40:19,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:40:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:40:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:40:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:40:20,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:40:20,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:40:20,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:40:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:20,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:40:21,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:21,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:21,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:40:21,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 231 treesize of output 173 [2022-02-11 01:40:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:22,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744931287] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:40:22,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:40:22,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:40:22,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744837694] [2022-02-11 01:40:22,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:40:22,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:40:22,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:40:22,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:40:22,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:40:22,147 INFO L87 Difference]: Start difference. First operand 4819 states and 17605 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) [2022-02-11 01:40:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:40:24,949 INFO L93 Difference]: Finished difference Result 8653 states and 30292 transitions. [2022-02-11 01:40:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:40:24,950 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 26 [2022-02-11 01:40:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:40:24,969 INFO L225 Difference]: With dead ends: 8653 [2022-02-11 01:40:24,969 INFO L226 Difference]: Without dead ends: 8632 [2022-02-11 01:40:24,969 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=586, Invalid=3446, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 01:40:24,970 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 344 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:40:24,970 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 493 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 596 Invalid, 0 Unknown, 984 Unchecked, 0.4s Time] [2022-02-11 01:40:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-02-11 01:40:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 4820. [2022-02-11 01:40:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4820 states, 4819 states have (on average 3.65428512139448) internal successors, (17610), 4819 states have internal predecessors, (17610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 17610 transitions. [2022-02-11 01:40:25,098 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 17610 transitions. Word has length 26 [2022-02-11 01:40:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:40:25,099 INFO L470 AbstractCegarLoop]: Abstraction has 4820 states and 17610 transitions. [2022-02-11 01:40:25,099 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) [2022-02-11 01:40:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 17610 transitions. [2022-02-11 01:40:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:40:25,107 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:40:25,107 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:40:25,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-11 01:40:25,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:25,323 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:40:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:40:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash 99228650, now seen corresponding path program 66 times [2022-02-11 01:40:25,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:40:25,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569797779] [2022-02-11 01:40:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:40:25,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:40:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:25,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:40:25,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569797779] [2022-02-11 01:40:25,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569797779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:40:25,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809486721] [2022-02-11 01:40:25,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:40:25,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:25,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:40:25,596 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) [2022-02-11 01:40:25,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-11 01:40:25,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:40:25,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:40:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:40:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:40:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:40:25,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:40:25,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:40:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:26,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:40:26,825 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:40:26,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-02-11 01:40:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:29,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809486721] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:40:29,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:40:29,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 01:40:29,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886594185] [2022-02-11 01:40:29,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:40:29,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:40:29,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:40:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:40:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:40:29,001 INFO L87 Difference]: Start difference. First operand 4820 states and 17610 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:40:35,967 INFO L93 Difference]: Finished difference Result 8880 states and 30014 transitions. [2022-02-11 01:40:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:40:35,967 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:40:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:40:35,987 INFO L225 Difference]: With dead ends: 8880 [2022-02-11 01:40:35,987 INFO L226 Difference]: Without dead ends: 8830 [2022-02-11 01:40:35,987 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1121, Invalid=6711, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 01:40:35,988 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 362 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:40:35,988 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 528 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 01:40:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8830 states. [2022-02-11 01:40:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8830 to 4782. [2022-02-11 01:40:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4782 states, 4781 states have (on average 3.6540472704455134) internal successors, (17470), 4781 states have internal predecessors, (17470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4782 states to 4782 states and 17470 transitions. [2022-02-11 01:40:36,105 INFO L78 Accepts]: Start accepts. Automaton has 4782 states and 17470 transitions. Word has length 26 [2022-02-11 01:40:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:40:36,105 INFO L470 AbstractCegarLoop]: Abstraction has 4782 states and 17470 transitions. [2022-02-11 01:40:36,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4782 states and 17470 transitions. [2022-02-11 01:40:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:40:36,114 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:40:36,114 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:40:36,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-11 01:40:36,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-11 01:40:36,330 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:40:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:40:36,330 INFO L85 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 55 times [2022-02-11 01:40:36,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:40:36,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112029879] [2022-02-11 01:40:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:40:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:40:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:36,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:40:36,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112029879] [2022-02-11 01:40:36,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112029879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:40:36,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251056675] [2022-02-11 01:40:36,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:40:36,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:36,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:40:36,527 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) [2022-02-11 01:40:36,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-11 01:40:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:36,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:40:36,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:40:37,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:40:37,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:37,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:37,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-11 01:40:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:37,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:40:37,662 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:40:37,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-02-11 01:40:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:38,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251056675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:40:38,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:40:38,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 01:40:38,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710026024] [2022-02-11 01:40:38,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:40:38,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:40:38,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:40:38,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:40:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:40:38,472 INFO L87 Difference]: Start difference. First operand 4782 states and 17470 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2022-02-11 01:40:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:40:44,367 INFO L93 Difference]: Finished difference Result 7346 states and 25456 transitions. [2022-02-11 01:40:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 01:40:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 26 [2022-02-11 01:40:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:40:44,383 INFO L225 Difference]: With dead ends: 7346 [2022-02-11 01:40:44,384 INFO L226 Difference]: Without dead ends: 7288 [2022-02-11 01:40:44,384 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1468, Invalid=7274, Unknown=0, NotChecked=0, Total=8742 [2022-02-11 01:40:44,385 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 272 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:40:44,385 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 644 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:40:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7288 states. [2022-02-11 01:40:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7288 to 4857. [2022-02-11 01:40:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4857 states, 4856 states have (on average 3.642504118616145) internal successors, (17688), 4856 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4857 states to 4857 states and 17688 transitions. [2022-02-11 01:40:44,489 INFO L78 Accepts]: Start accepts. Automaton has 4857 states and 17688 transitions. Word has length 26 [2022-02-11 01:40:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:40:44,489 INFO L470 AbstractCegarLoop]: Abstraction has 4857 states and 17688 transitions. [2022-02-11 01:40:44,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2022-02-11 01:40:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4857 states and 17688 transitions. [2022-02-11 01:40:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:40:44,497 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:40:44,497 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:40:44,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-11 01:40:44,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-11 01:40:44,713 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:40:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:40:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash -231497226, now seen corresponding path program 56 times [2022-02-11 01:40:44,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:40:44,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012469719] [2022-02-11 01:40:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:40:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:40:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:44,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:40:44,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012469719] [2022-02-11 01:40:44,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012469719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:40:44,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960193736] [2022-02-11 01:40:44,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:40:44,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:40:44,909 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) [2022-02-11 01:40:44,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-11 01:40:44,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:40:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:40:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:40:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:40:45,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:40:45,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:40:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:45,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-02-11 01:40:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:45,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:40:45,949 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:40:45,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-02-11 01:40:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:46,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960193736] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:40:46,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:40:46,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-11 01:40:46,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18056873] [2022-02-11 01:40:46,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:40:46,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:40:46,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:40:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:40:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:40:46,878 INFO L87 Difference]: Start difference. First operand 4857 states and 17688 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:40:52,716 INFO L93 Difference]: Finished difference Result 7389 states and 25650 transitions. [2022-02-11 01:40:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-11 01:40:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:40:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:40:52,756 INFO L225 Difference]: With dead ends: 7389 [2022-02-11 01:40:52,756 INFO L226 Difference]: Without dead ends: 7269 [2022-02-11 01:40:52,757 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1731, Invalid=8775, Unknown=0, NotChecked=0, Total=10506 [2022-02-11 01:40:52,757 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 341 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:40:52,757 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 426 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1733 Invalid, 0 Unknown, 42 Unchecked, 0.8s Time] [2022-02-11 01:40:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7269 states. [2022-02-11 01:40:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7269 to 4859. [2022-02-11 01:40:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4859 states, 4858 states have (on average 3.6381226842321945) internal successors, (17674), 4858 states have internal predecessors, (17674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4859 states to 4859 states and 17674 transitions. [2022-02-11 01:40:52,847 INFO L78 Accepts]: Start accepts. Automaton has 4859 states and 17674 transitions. Word has length 26 [2022-02-11 01:40:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:40:52,847 INFO L470 AbstractCegarLoop]: Abstraction has 4859 states and 17674 transitions. [2022-02-11 01:40:52,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:40:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4859 states and 17674 transitions. [2022-02-11 01:40:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:40:52,855 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:40:52,855 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:40:52,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-11 01:40:53,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:53,071 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:40:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:40:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash 186452920, now seen corresponding path program 67 times [2022-02-11 01:40:53,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:40:53,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832076773] [2022-02-11 01:40:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:40:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:40:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:53,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:40:53,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832076773] [2022-02-11 01:40:53,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832076773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:40:53,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121834905] [2022-02-11 01:40:53,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:40:53,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:40:53,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:40:53,287 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) [2022-02-11 01:40:53,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-11 01:40:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:40:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:40:53,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:40:54,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:40:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:40:54,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-11 01:40:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:40:54,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:40:55,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:40:55,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-02-11 01:41:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:05,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121834905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:41:05,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:41:05,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:41:05,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178309726] [2022-02-11 01:41:05,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:41:05,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:41:05,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:41:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:41:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:41:05,177 INFO L87 Difference]: Start difference. First operand 4859 states and 17674 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) [2022-02-11 01:41:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:41:06,631 INFO L93 Difference]: Finished difference Result 7070 states and 24691 transitions. [2022-02-11 01:41:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:41:06,631 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 26 [2022-02-11 01:41:06,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:41:06,647 INFO L225 Difference]: With dead ends: 7070 [2022-02-11 01:41:06,647 INFO L226 Difference]: Without dead ends: 7040 [2022-02-11 01:41:06,648 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 01:41:06,648 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 222 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:41:06,648 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 358 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 909 Invalid, 0 Unknown, 602 Unchecked, 0.4s Time] [2022-02-11 01:41:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2022-02-11 01:41:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 4887. [2022-02-11 01:41:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4887 states, 4886 states have (on average 3.6379451494064674) internal successors, (17775), 4886 states have internal predecessors, (17775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:41:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4887 states to 4887 states and 17775 transitions. [2022-02-11 01:41:06,748 INFO L78 Accepts]: Start accepts. Automaton has 4887 states and 17775 transitions. Word has length 26 [2022-02-11 01:41:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:41:06,748 INFO L470 AbstractCegarLoop]: Abstraction has 4887 states and 17775 transitions. [2022-02-11 01:41:06,749 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) [2022-02-11 01:41:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4887 states and 17775 transitions. [2022-02-11 01:41:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:41:06,757 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:41:06,757 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:41:06,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-11 01:41:06,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-11 01:41:06,968 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:41:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:41:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1431079860, now seen corresponding path program 68 times [2022-02-11 01:41:06,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:41:06,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762199633] [2022-02-11 01:41:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:41:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:41:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:41:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:07,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:41:07,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762199633] [2022-02-11 01:41:07,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762199633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:41:07,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448633132] [2022-02-11 01:41:07,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:41:07,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:41:07,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:41:07,214 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) [2022-02-11 01:41:07,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-11 01:41:07,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:41:07,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:41:07,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:41:07,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:41:07,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:41:07,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:41:07,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-11 01:41:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:08,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:41:09,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:41:09,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 165 [2022-02-11 01:41:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:17,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448633132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:41:17,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:41:17,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:41:17,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340452493] [2022-02-11 01:41:17,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:41:17,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:41:17,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:41:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:41:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:41:18,000 INFO L87 Difference]: Start difference. First operand 4887 states and 17775 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) [2022-02-11 01:41:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:41:20,362 INFO L93 Difference]: Finished difference Result 7923 states and 27240 transitions. [2022-02-11 01:41:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:41:20,362 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 26 [2022-02-11 01:41:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:41:20,381 INFO L225 Difference]: With dead ends: 7923 [2022-02-11 01:41:20,381 INFO L226 Difference]: Without dead ends: 7878 [2022-02-11 01:41:20,381 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=593, Invalid=2947, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 01:41:20,381 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 258 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:41:20,382 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 352 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 772 Invalid, 0 Unknown, 531 Unchecked, 0.4s Time] [2022-02-11 01:41:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2022-02-11 01:41:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 4900. [2022-02-11 01:41:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4900 states, 4899 states have (on average 3.6378852827107573) internal successors, (17822), 4899 states have internal predecessors, (17822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:41:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4900 states to 4900 states and 17822 transitions. [2022-02-11 01:41:20,492 INFO L78 Accepts]: Start accepts. Automaton has 4900 states and 17822 transitions. Word has length 26 [2022-02-11 01:41:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:41:20,492 INFO L470 AbstractCegarLoop]: Abstraction has 4900 states and 17822 transitions. [2022-02-11 01:41:20,492 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) [2022-02-11 01:41:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4900 states and 17822 transitions. [2022-02-11 01:41:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:41:20,500 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:41:20,500 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:41:20,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-11 01:41:20,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-11 01:41:20,715 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:41:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:41:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2114372754, now seen corresponding path program 69 times [2022-02-11 01:41:20,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:41:20,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466915480] [2022-02-11 01:41:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:41:20,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:41:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:41:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:20,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:41:20,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466915480] [2022-02-11 01:41:20,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466915480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:41:20,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413237128] [2022-02-11 01:41:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:41:20,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:41:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:41:21,020 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) [2022-02-11 01:41:21,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-11 01:41:21,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:41:21,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:41:21,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:41:21,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:41:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:41:21,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:41:21,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:41:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:21,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:41:22,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:41:22,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:41:22,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-02-11 01:41:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:25,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413237128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:41:25,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:41:25,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:41:25,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934670508] [2022-02-11 01:41:25,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:41:25,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:41:25,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:41:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:41:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:41:25,551 INFO L87 Difference]: Start difference. First operand 4900 states and 17822 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) [2022-02-11 01:41:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:41:29,006 INFO L93 Difference]: Finished difference Result 8117 states and 27795 transitions. [2022-02-11 01:41:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:41:29,007 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 26 [2022-02-11 01:41:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:41:29,023 INFO L225 Difference]: With dead ends: 8117 [2022-02-11 01:41:29,023 INFO L226 Difference]: Without dead ends: 8087 [2022-02-11 01:41:29,024 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=688, Invalid=3218, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 01:41:29,024 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 307 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:41:29,024 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 521 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1548 Invalid, 0 Unknown, 369 Unchecked, 0.8s Time] [2022-02-11 01:41:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2022-02-11 01:41:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 4890. [2022-02-11 01:41:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 3.6365309879320926) internal successors, (17779), 4889 states have internal predecessors, (17779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:41:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 17779 transitions. [2022-02-11 01:41:29,115 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 17779 transitions. Word has length 26 [2022-02-11 01:41:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:41:29,115 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 17779 transitions. [2022-02-11 01:41:29,115 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) [2022-02-11 01:41:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 17779 transitions. [2022-02-11 01:41:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:41:29,122 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:41:29,122 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:41:29,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-11 01:41:29,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-11 01:41:29,328 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:41:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:41:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1173944532, now seen corresponding path program 70 times [2022-02-11 01:41:29,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:41:29,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883265073] [2022-02-11 01:41:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:41:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:41:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:41:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:29,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:41:29,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883265073] [2022-02-11 01:41:29,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883265073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:41:29,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331853878] [2022-02-11 01:41:29,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:41:29,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:41:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:41:29,621 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) [2022-02-11 01:41:29,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-11 01:41:29,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:41:29,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:41:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:41:29,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:41:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:41:30,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:41:30,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-11 01:41:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:30,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:41:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:41:30,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:41:30,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 181 [2022-02-11 01:41:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:41:35,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331853878] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:41:35,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:41:35,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:41:35,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112060051] [2022-02-11 01:41:35,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:41:35,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:41:35,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:41:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:41:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:41:35,496 INFO L87 Difference]: Start difference. First operand 4890 states and 17779 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) Received shutdown request... [2022-02-11 01:41:37,970 WARN L244 SmtUtils]: Removed 7 from assertion stack [2022-02-11 01:41:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 01:41:37,971 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=503, Invalid=2359, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 01:41:37,971 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 245 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:41:37,971 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 198 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 677 Invalid, 0 Unknown, 352 Unchecked, 0.4s Time] [2022-02-11 01:41:37,972 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-11 01:41:37,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-02-11 01:41:38,006 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:41:38,007 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 [2022-02-11 01:41:38,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-11 01:41:38,189 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (4890states) and FLOYD_HOARE automaton (currently 35 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 17ms.. [2022-02-11 01:41:38,190 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-11 01:41:38,191 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-11 01:41:38,191 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-11 01:41:38,193 INFO L733 BasicCegarLoop]: Path program histogram: [70, 56, 1, 1, 1] [2022-02-11 01:41:38,194 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:41:38,194 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:41:38,197 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:41:38 BasicIcfg [2022-02-11 01:41:38,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:41:38,197 INFO L158 Benchmark]: Toolchain (without parser) took 874860.28ms. Allocated memory was 166.7MB in the beginning and 822.1MB in the end (delta: 655.4MB). Free memory was 130.6MB in the beginning and 693.1MB in the end (delta: -562.5MB). Peak memory consumption was 94.0MB. Max. memory is 8.0GB. [2022-02-11 01:41:38,197 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 166.7MB. Free memory is still 131.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:41:38,197 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.82ms. Allocated memory is still 166.7MB. Free memory was 130.5MB in the beginning and 129.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-11 01:41:38,197 INFO L158 Benchmark]: Boogie Preprocessor took 19.20ms. Allocated memory is still 166.7MB. Free memory was 129.0MB in the beginning and 128.0MB in the end (delta: 913.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:41:38,197 INFO L158 Benchmark]: RCFGBuilder took 188.27ms. Allocated memory is still 166.7MB. Free memory was 127.9MB in the beginning and 118.3MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 01:41:38,197 INFO L158 Benchmark]: TraceAbstraction took 874618.24ms. Allocated memory was 166.7MB in the beginning and 822.1MB in the end (delta: 655.4MB). Free memory was 117.9MB in the beginning and 693.1MB in the end (delta: -575.2MB). Peak memory consumption was 81.4MB. Max. memory is 8.0GB. [2022-02-11 01:41:38,198 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 0.10ms. Allocated memory is still 166.7MB. Free memory is still 131.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.82ms. Allocated memory is still 166.7MB. Free memory was 130.5MB in the beginning and 129.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.20ms. Allocated memory is still 166.7MB. Free memory was 129.0MB in the beginning and 128.0MB in the end (delta: 913.2kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 188.27ms. Allocated memory is still 166.7MB. Free memory was 127.9MB in the beginning and 118.3MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 874618.24ms. Allocated memory was 166.7MB in the beginning and 822.1MB in the end (delta: 655.4MB). Free memory was 117.9MB in the beginning and 693.1MB in the end (delta: -575.2MB). Peak memory consumption was 81.4MB. Max. memory is 8.0GB. * 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: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4890states) and FLOYD_HOARE automaton (currently 35 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 17ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4890states) and FLOYD_HOARE automaton (currently 35 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 17ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4890states) and FLOYD_HOARE automaton (currently 35 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 17ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4890states) and FLOYD_HOARE automaton (currently 35 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 17ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 874.5s, OverallIterations: 129, TraceHistogramMax: 2, PathProgramHistogramMax: 70, EmptinessCheckTime: 0.6s, AutomataDifference: 502.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48729 SdHoareTripleChecker+Valid, 80.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48729 mSDsluCounter, 48061 SdHoareTripleChecker+Invalid, 69.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 33367 IncrementalHoareTripleChecker+Unchecked, 80918 mSDsCounter, 9530 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 157120 IncrementalHoareTripleChecker+Invalid, 200017 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9530 mSolverCounterUnsat, 4133 mSDtfsCounter, 157120 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14275 GetRequests, 4720 SyntacticMatches, 351 SemanticMatches, 9203 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 358950 ImplicationChecksByTransitivity, 455.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4900occurred in iteration=127, InterpolantAutomatonStates: 7523, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.2s AutomataMinimizationTime, 128 MinimizatonAttempts, 334689 StatesRemovedByMinimization, 128 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 330.0s InterpolantComputationTime, 6442 NumberOfCodeBlocks, 6436 NumberOfCodeBlocksAsserted, 411 NumberOfCheckSat, 9253 ConstructedInterpolants, 197 QuantifiedInterpolants, 219015 SizeOfPredicates, 1464 NumberOfNonLiveVariables, 8087 ConjunctsInSsa, 2594 ConjunctsInUnsatCore, 381 InterpolantComputations, 3 PerfectInterpolantSequences, 174/2228 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