/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/dot-product-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:19:59,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:19:59,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:19:59,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:19:59,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:19:59,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:19:59,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:19:59,974 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 01:19:59,993 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:19:59,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:19:59,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:19:59,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:19:59,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:19:59,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:19:59,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:19:59,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:19:59,995 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:19:59,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:19:59,996 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:19:59,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:19:59,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:19:59,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:19:59,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:19:59,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:19:59,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:19:59,997 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:19:59,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:19:59,997 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:19:59,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:19:59,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:19:59,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:19:59,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:19:59,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:19:59,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:19:59,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:19:59,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:19:59,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:19:59,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:19:59,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:19:59,999 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:19:59,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:19:59,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:20:00,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:20:00,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:20:00,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:20:00,268 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:20:00,268 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:20:00,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl [2022-02-11 01:20:00,270 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl' [2022-02-11 01:20:00,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:20:00,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:20:00,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:20:00,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:20:00,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:20:00,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,330 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:20:00,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:20:00,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:20:00,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:20:00,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:20:00,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:20:00,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:20:00,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:20:00,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:20:00,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/1) ... [2022-02-11 01:20:00,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:20:00,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:00,377 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 01:20:00,385 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 01:20:00,417 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:20:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:20:00,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:20:00,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:20:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:20:00,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:20:00,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:20:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:20:00,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:20:00,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 01:20:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 01:20:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 01:20:00,419 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 01:20:00,462 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:20:00,464 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:20:00,580 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:20:00,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:20:00,593 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:20:00,603 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:20:00 BoogieIcfgContainer [2022-02-11 01:20:00,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:20:00,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:20:00,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:20:00,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:20:00,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:20:00" (1/2) ... [2022-02-11 01:20:00,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4093bd31 and model type dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:20:00, skipping insertion in model container [2022-02-11 01:20:00,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:20:00" (2/2) ... [2022-02-11 01:20:00,614 INFO L112 eAbstractionObserver]: Analyzing ICFG dot-product-array.wvr.bpl [2022-02-11 01:20:00,623 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:20:00,624 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:20:00,625 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:20:00,625 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:20:00,686 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 01:20:00,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:20:00,748 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 01:20:00,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 01:20:00,761 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-02-11 01:20:00,798 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 01:20:00,801 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 01:20:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:20:00,808 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:00,809 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 01:20:00,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:00,813 INFO L85 PathProgramCache]: Analyzing trace with hash -798073446, now seen corresponding path program 1 times [2022-02-11 01:20:00,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:00,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445268327] [2022-02-11 01:20:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:00,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:00,938 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 01:20:00,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:00,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445268327] [2022-02-11 01:20:00,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445268327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:20:00,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:20:00,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:20:00,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117628307] [2022-02-11 01:20:00,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:20:00,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:20:00,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:20:00,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:20:00,971 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 01:20:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:01,016 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-02-11 01:20:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:20:01,018 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 01:20:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:01,050 INFO L225 Difference]: With dead ends: 217 [2022-02-11 01:20:01,051 INFO L226 Difference]: Without dead ends: 202 [2022-02-11 01:20:01,052 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 01:20:01,055 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 01:20:01,056 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 01:20:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-11 01:20:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-02-11 01:20:01,153 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 01:20:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-02-11 01:20:01,159 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-02-11 01:20:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:01,160 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-02-11 01:20:01,160 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 01:20:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-02-11 01:20:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 01:20:01,163 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:01,167 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 01:20:01,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:20:01,167 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 216086682, now seen corresponding path program 1 times [2022-02-11 01:20:01,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:01,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298365704] [2022-02-11 01:20:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:01,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:01,239 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 01:20:01,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:01,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298365704] [2022-02-11 01:20:01,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298365704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:20:01,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:20:01,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:20:01,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665738364] [2022-02-11 01:20:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:20:01,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:20:01,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:20:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:20:01,243 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 01:20:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:01,314 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-02-11 01:20:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:20:01,315 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 01:20:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:01,317 INFO L225 Difference]: With dead ends: 158 [2022-02-11 01:20:01,317 INFO L226 Difference]: Without dead ends: 158 [2022-02-11 01:20:01,318 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 01:20:01,319 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 01:20:01,320 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 01:20:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-11 01:20:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-02-11 01:20:01,335 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 01:20:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-02-11 01:20:01,337 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-02-11 01:20:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:01,338 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-02-11 01:20:01,338 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 01:20:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-02-11 01:20:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 01:20:01,339 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:01,340 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 01:20:01,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:20:01,340 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash 924693880, now seen corresponding path program 1 times [2022-02-11 01:20:01,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:01,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614817932] [2022-02-11 01:20:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:01,415 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 01:20:01,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:01,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614817932] [2022-02-11 01:20:01,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614817932] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:20:01,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:20:01,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:20:01,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847694923] [2022-02-11 01:20:01,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:20:01,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:20:01,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:20:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:20:01,418 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 01:20:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:01,488 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-02-11 01:20:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:20:01,488 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 01:20:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:01,490 INFO L225 Difference]: With dead ends: 183 [2022-02-11 01:20:01,491 INFO L226 Difference]: Without dead ends: 183 [2022-02-11 01:20:01,491 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 01:20:01,492 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 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 01:20:01,493 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 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 01:20:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-11 01:20:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-02-11 01:20:01,506 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 01:20:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-02-11 01:20:01,507 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-02-11 01:20:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:01,508 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-02-11 01:20:01,508 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 01:20:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-02-11 01:20:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:20:01,510 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:01,510 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 01:20:01,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:20:01,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash 575000696, now seen corresponding path program 1 times [2022-02-11 01:20:01,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:01,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291533981] [2022-02-11 01:20:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:01,848 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 01:20:01,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:01,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291533981] [2022-02-11 01:20:01,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291533981] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:01,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938921607] [2022-02-11 01:20:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:01,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:01,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:01,859 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 01:20:01,871 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 01:20:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:01,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:20:01,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:02,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:02,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-02-11 01:20:02,348 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-11 01:20:02,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2022-02-11 01:20:02,396 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 01:20:02,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:02,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:02,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:20:02,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:02,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:20:02,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:02,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:20:02,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-11 01:20:02,621 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:20:02,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:20:02,742 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 01:20:02,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938921607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:02,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:02,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 01:20:02,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852483769] [2022-02-11 01:20:02,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:02,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:20:02,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:20:02,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:20:02,745 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:03,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:03,035 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-02-11 01:20:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:20:03,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:20:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:03,039 INFO L225 Difference]: With dead ends: 366 [2022-02-11 01:20:03,039 INFO L226 Difference]: Without dead ends: 351 [2022-02-11 01:20:03,040 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:20:03,041 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:03,041 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-11 01:20:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-02-11 01:20:03,055 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 01:20:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-02-11 01:20:03,056 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-02-11 01:20:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:03,057 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-02-11 01:20:03,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-02-11 01:20:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:20:03,059 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:03,059 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 01:20:03,081 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 01:20:03,269 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 01:20:03,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash 407191604, now seen corresponding path program 2 times [2022-02-11 01:20:03,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:03,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944339039] [2022-02-11 01:20:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:03,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:03,491 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 01:20:03,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:03,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944339039] [2022-02-11 01:20:03,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944339039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:03,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473487840] [2022-02-11 01:20:03,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:03,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:03,494 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 01:20:03,526 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 01:20:03,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:03,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:20:03,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:03,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:03,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-11 01:20:03,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:03,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-11 01:20:03,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:03,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-02-11 01:20:03,848 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 01:20:03,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:03,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:03,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:20:03,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:03,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:20:04,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:04,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:20:04,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-11 01:20:04,051 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:20:04,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:20:04,165 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 01:20:04,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473487840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:04,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:04,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-02-11 01:20:04,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550243368] [2022-02-11 01:20:04,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:04,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 01:20:04,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 01:20:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-11 01:20:04,168 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:04,862 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-02-11 01:20:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:20:04,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:20:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:04,866 INFO L225 Difference]: With dead ends: 478 [2022-02-11 01:20:04,866 INFO L226 Difference]: Without dead ends: 463 [2022-02-11 01:20:04,866 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:20:04,867 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:04,867 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 97 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-11 01:20:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-02-11 01:20:04,883 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 01:20:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-02-11 01:20:04,888 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-02-11 01:20:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:04,888 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-02-11 01:20:04,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-02-11 01:20:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:20:04,895 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:04,895 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 01:20:04,921 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 01:20:05,111 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 01:20:05,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash 705965052, now seen corresponding path program 3 times [2022-02-11 01:20:05,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:05,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247488360] [2022-02-11 01:20:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:05,288 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 01:20:05,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:05,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247488360] [2022-02-11 01:20:05,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247488360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:05,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168149336] [2022-02-11 01:20:05,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:05,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:05,291 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 01:20:05,292 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 01:20:05,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:20:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:05,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:20:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:05,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-02-11 01:20:05,555 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 01:20:05,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:05,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:05,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:20:05,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:05,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:20:05,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:05,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:20:05,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-11 01:20:05,697 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:20:05,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:20:05,837 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 01:20:05,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168149336] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:05,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:05,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:20:05,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748026315] [2022-02-11 01:20:05,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:05,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:20:05,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:20:05,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:20:05,840 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:06,180 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-02-11 01:20:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:20:06,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:20:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:06,183 INFO L225 Difference]: With dead ends: 418 [2022-02-11 01:20:06,183 INFO L226 Difference]: Without dead ends: 403 [2022-02-11 01:20:06,184 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:20:06,184 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:06,185 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 86 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:20:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-11 01:20:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-02-11 01:20:06,194 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 01:20:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-02-11 01:20:06,195 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-02-11 01:20:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:06,195 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-02-11 01:20:06,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-02-11 01:20:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:20:06,196 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:06,196 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 01:20:06,220 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 01:20:06,419 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 01:20:06,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2018176644, now seen corresponding path program 4 times [2022-02-11 01:20:06,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:06,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574206100] [2022-02-11 01:20:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:06,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:06,579 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 01:20:06,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:06,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574206100] [2022-02-11 01:20:06,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574206100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:06,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850315205] [2022-02-11 01:20:06,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:06,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:06,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:06,588 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 01:20:06,589 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 01:20:06,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:20:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:06,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:06,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-11 01:20:06,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:06,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-11 01:20:06,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:06,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-02-11 01:20:06,915 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 01:20:06,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:07,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:07,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:20:07,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:07,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:20:07,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:07,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:20:07,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-11 01:20:07,090 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:20:07,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:20:07,221 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 01:20:07,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850315205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:07,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:07,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:20:07,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328736623] [2022-02-11 01:20:07,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:07,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:20:07,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:07,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:20:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:20:07,223 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:07,453 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-02-11 01:20:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:20:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:20:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:07,456 INFO L225 Difference]: With dead ends: 381 [2022-02-11 01:20:07,456 INFO L226 Difference]: Without dead ends: 366 [2022-02-11 01:20:07,456 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:20:07,457 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:07,457 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 94 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-02-11 01:20:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-02-11 01:20:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-02-11 01:20:07,465 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 01:20:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-02-11 01:20:07,466 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-02-11 01:20:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:07,467 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-02-11 01:20:07,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-02-11 01:20:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:20:07,468 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:07,468 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 01:20:07,497 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 01:20:07,697 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 01:20:07,698 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash 29371358, now seen corresponding path program 5 times [2022-02-11 01:20:07,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:07,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713462603] [2022-02-11 01:20:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:07,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:07,843 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 01:20:07,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:07,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713462603] [2022-02-11 01:20:07,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713462603] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:07,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933966049] [2022-02-11 01:20:07,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:20:07,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:07,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:07,848 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 01:20:07,876 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 01:20:07,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:20:07,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:20:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:08,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:08,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2022-02-11 01:20:08,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:08,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 61 [2022-02-11 01:20:08,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:08,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-02-11 01:20:08,313 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 01:20:08,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:08,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:08,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:20:08,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:08,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:20:08,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:08,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:20:08,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-11 01:20:08,527 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:20:08,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:20:08,693 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 01:20:08,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933966049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:08,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:08,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-02-11 01:20:08,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239117970] [2022-02-11 01:20:08,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:08,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:20:08,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:20:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:20:08,695 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:13,748 INFO L93 Difference]: Finished difference Result 1134 states and 3376 transitions. [2022-02-11 01:20:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-11 01:20:13,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 01:20:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:13,754 INFO L225 Difference]: With dead ends: 1134 [2022-02-11 01:20:13,754 INFO L226 Difference]: Without dead ends: 1119 [2022-02-11 01:20:13,757 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2044, Invalid=7856, Unknown=0, NotChecked=0, Total=9900 [2022-02-11 01:20:13,757 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 547 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:13,758 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 238 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 691 Invalid, 0 Unknown, 372 Unchecked, 0.6s Time] [2022-02-11 01:20:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-02-11 01:20:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 261. [2022-02-11 01:20:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-02-11 01:20:13,772 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-02-11 01:20:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:13,773 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-02-11 01:20:13,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-02-11 01:20:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:20:13,774 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:13,774 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 01:20:13,800 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 01:20:13,995 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 01:20:13,996 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1593497758, now seen corresponding path program 6 times [2022-02-11 01:20:13,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:13,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594543818] [2022-02-11 01:20:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:13,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:14,133 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 01:20:14,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:14,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594543818] [2022-02-11 01:20:14,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594543818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:14,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540959037] [2022-02-11 01:20:14,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:20:14,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:14,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:14,135 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 01:20:14,169 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 01:20:14,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:20:14,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:20:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:14,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-02-11 01:20:14,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-02-11 01:20:14,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-02-11 01:20:14,459 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 01:20:14,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:14,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-02-11 01:20:14,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 01:20:14,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:14,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-02-11 01:20:14,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-11 01:20:14,642 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-02-11 01:20:14,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-02-11 01:20:14,735 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 01:20:14,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540959037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:14,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:14,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-02-11 01:20:14,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116489513] [2022-02-11 01:20:14,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:14,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:20:14,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:20:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:20:14,737 INFO L87 Difference]: Start difference. First operand 261 states and 785 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 01:20:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:15,498 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-02-11 01:20:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 01:20:15,498 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 01:20:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:15,502 INFO L225 Difference]: With dead ends: 585 [2022-02-11 01:20:15,502 INFO L226 Difference]: Without dead ends: 570 [2022-02-11 01:20:15,502 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:20:15,503 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:15,503 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:15,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-11 01:20:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-02-11 01:20:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-02-11 01:20:15,513 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-02-11 01:20:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:15,513 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-02-11 01:20:15,513 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 01:20:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-02-11 01:20:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:15,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:15,514 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 01:20:15,542 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 01:20:15,727 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 01:20:15,728 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1804181270, now seen corresponding path program 7 times [2022-02-11 01:20:15,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:15,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821128531] [2022-02-11 01:20:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:15,785 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 01:20:15,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:15,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821128531] [2022-02-11 01:20:15,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821128531] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:15,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43799600] [2022-02-11 01:20:15,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:20:15,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:15,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:15,787 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 01:20:15,819 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 01:20:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:15,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:15,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:15,919 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 01:20:15,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:16,010 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 01:20:16,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43799600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:16,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:16,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:20:16,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586876665] [2022-02-11 01:20:16,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:16,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:20:16,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:20:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:20:16,014 INFO L87 Difference]: Start difference. First operand 258 states and 770 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 01:20:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:16,802 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-02-11 01:20:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:20:16,802 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 01:20:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:16,808 INFO L225 Difference]: With dead ends: 1123 [2022-02-11 01:20:16,808 INFO L226 Difference]: Without dead ends: 1123 [2022-02-11 01:20:16,809 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 01:20:16,810 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:16,811 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 200 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-02-11 01:20:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-02-11 01:20:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-02-11 01:20:16,825 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-02-11 01:20:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:16,826 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-02-11 01:20:16,826 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 01:20:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-02-11 01:20:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:16,828 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:16,828 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 01:20:16,853 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 01:20:17,035 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 01:20:17,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash 827862426, now seen corresponding path program 8 times [2022-02-11 01:20:17,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:17,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914132943] [2022-02-11 01:20:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:17,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:17,095 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 01:20:17,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:17,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914132943] [2022-02-11 01:20:17,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914132943] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:17,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206146546] [2022-02-11 01:20:17,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:17,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:17,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:17,100 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 01:20:17,109 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 01:20:17,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:17,253 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 01:20:17,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:17,356 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 01:20:17,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206146546] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:17,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:17,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:20:17,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863071254] [2022-02-11 01:20:17,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:17,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:20:17,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:20:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:20:17,358 INFO L87 Difference]: Start difference. First operand 322 states and 1026 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 01:20:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:19,188 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-02-11 01:20:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-11 01:20:19,188 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 01:20:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:19,198 INFO L225 Difference]: With dead ends: 1814 [2022-02-11 01:20:19,198 INFO L226 Difference]: Without dead ends: 1814 [2022-02-11 01:20:19,200 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 01:20:19,201 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 482 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:19,201 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 328 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:20:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-02-11 01:20:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-02-11 01:20:19,222 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 01:20:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-02-11 01:20:19,223 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-02-11 01:20:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:19,224 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-02-11 01:20:19,224 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 01:20:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-02-11 01:20:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:19,225 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:19,225 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 01:20:19,253 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 01:20:19,439 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 01:20:19,440 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1394814506, now seen corresponding path program 9 times [2022-02-11 01:20:19,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:19,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310287350] [2022-02-11 01:20:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:19,485 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 01:20:19,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:19,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310287350] [2022-02-11 01:20:19,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310287350] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:19,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218933522] [2022-02-11 01:20:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:19,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:19,487 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 01:20:19,499 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 01:20:19,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:20:19,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:19,620 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 01:20:19,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:19,715 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 01:20:19,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218933522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:19,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:19,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:20:19,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809941681] [2022-02-11 01:20:19,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:20:19,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:20:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:20:19,716 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 01:20:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:20,615 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-02-11 01:20:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:20:20,615 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 01:20:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:20,621 INFO L225 Difference]: With dead ends: 1470 [2022-02-11 01:20:20,621 INFO L226 Difference]: Without dead ends: 1470 [2022-02-11 01:20:20,623 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 01:20:20,623 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 363 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:20,623 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 275 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:20:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-02-11 01:20:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-02-11 01:20:20,637 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 01:20:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-02-11 01:20:20,639 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-02-11 01:20:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:20,639 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-02-11 01:20:20,639 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 01:20:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-02-11 01:20:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:20,640 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:20,640 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 01:20:20,662 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 01:20:20,862 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 01:20:20,862 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1964014118, now seen corresponding path program 1 times [2022-02-11 01:20:20,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:20,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751865433] [2022-02-11 01:20:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:20,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:20,899 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 01:20:20,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:20,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751865433] [2022-02-11 01:20:20,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751865433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:20,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537369236] [2022-02-11 01:20:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:20,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:20,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:20,901 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 01:20:20,902 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 01:20:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:20:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:21,005 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 01:20:21,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:21,074 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 01:20:21,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537369236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:21,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:21,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:20:21,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439502535] [2022-02-11 01:20:21,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:21,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:20:21,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:20:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:20:21,075 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 01:20:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:21,220 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-02-11 01:20:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 01:20:21,221 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 01:20:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:21,224 INFO L225 Difference]: With dead ends: 685 [2022-02-11 01:20:21,224 INFO L226 Difference]: Without dead ends: 679 [2022-02-11 01:20:21,224 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 01:20:21,226 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:21,226 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 39 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:20:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-11 01:20:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-02-11 01:20:21,237 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 01:20:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-02-11 01:20:21,238 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-02-11 01:20:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:21,239 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-02-11 01:20:21,239 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 01:20:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-02-11 01:20:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:21,240 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:21,240 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 01:20:21,268 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 01:20:21,453 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 01:20:21,454 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1893984470, now seen corresponding path program 10 times [2022-02-11 01:20:21,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:21,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387794919] [2022-02-11 01:20:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:21,514 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 01:20:21,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:21,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387794919] [2022-02-11 01:20:21,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387794919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:21,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318750823] [2022-02-11 01:20:21,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:21,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:21,516 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 01:20:21,518 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 01:20:21,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:21,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:21,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:21,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:21,642 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 01:20:21,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:21,702 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 01:20:21,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318750823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:21,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:21,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:20:21,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464084089] [2022-02-11 01:20:21,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:21,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:20:21,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:21,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:20:21,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:20:21,708 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 01:20:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:22,025 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-02-11 01:20:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 01:20:22,025 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 01:20:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:22,029 INFO L225 Difference]: With dead ends: 1159 [2022-02-11 01:20:22,030 INFO L226 Difference]: Without dead ends: 1111 [2022-02-11 01:20:22,030 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 01:20:22,030 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 284 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:22,031 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 110 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-02-11 01:20:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-02-11 01:20:22,047 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 01:20:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-02-11 01:20:22,049 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-02-11 01:20:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:22,049 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-02-11 01:20:22,049 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 01:20:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-02-11 01:20:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:22,051 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:22,051 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 01:20:22,075 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 01:20:22,267 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 01:20:22,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1188027138, now seen corresponding path program 2 times [2022-02-11 01:20:22,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:22,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97458718] [2022-02-11 01:20:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:22,307 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 01:20:22,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:22,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97458718] [2022-02-11 01:20:22,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97458718] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:22,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133063481] [2022-02-11 01:20:22,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:22,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:22,310 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 01:20:22,311 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 01:20:22,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:22,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:22,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:20:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:22,433 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 01:20:22,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:22,517 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 01:20:22,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133063481] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:22,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:22,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-11 01:20:22,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632829193] [2022-02-11 01:20:22,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:22,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:20:22,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:20:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:20:22,519 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 01:20:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:22,706 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-02-11 01:20:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:20:22,707 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 01:20:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:22,712 INFO L225 Difference]: With dead ends: 1267 [2022-02-11 01:20:22,712 INFO L226 Difference]: Without dead ends: 1267 [2022-02-11 01:20:22,712 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 01:20:22,713 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:22,713 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 66 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:20:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-11 01:20:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-02-11 01:20:22,735 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 01:20:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-02-11 01:20:22,737 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-02-11 01:20:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:22,737 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-02-11 01:20:22,738 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 01:20:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-02-11 01:20:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:22,740 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:22,740 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 01:20:22,767 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 01:20:22,955 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 01:20:22,955 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash -158654428, now seen corresponding path program 11 times [2022-02-11 01:20:22,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:22,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291254725] [2022-02-11 01:20:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:23,006 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 01:20:23,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:23,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291254725] [2022-02-11 01:20:23,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291254725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:23,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144365132] [2022-02-11 01:20:23,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:20:23,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:23,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:23,008 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 01:20:23,013 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 01:20:23,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:20:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:23,107 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 01:20:23,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:23,179 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 01:20:23,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144365132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:23,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:23,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:20:23,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450110985] [2022-02-11 01:20:23,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:23,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:20:23,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:20:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:20:23,181 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 01:20:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:23,728 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-02-11 01:20:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:20:23,729 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 01:20:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:23,737 INFO L225 Difference]: With dead ends: 2268 [2022-02-11 01:20:23,738 INFO L226 Difference]: Without dead ends: 2268 [2022-02-11 01:20:23,738 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 01:20:23,739 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:23,739 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 165 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-02-11 01:20:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-02-11 01:20:23,768 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 01:20:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-02-11 01:20:23,770 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-02-11 01:20:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:23,771 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-02-11 01:20:23,771 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 01:20:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-02-11 01:20:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:23,772 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:23,773 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 01:20:23,792 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 01:20:23,982 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 01:20:23,982 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:23,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:23,983 INFO L85 PathProgramCache]: Analyzing trace with hash 626259666, now seen corresponding path program 12 times [2022-02-11 01:20:23,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:23,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50252276] [2022-02-11 01:20:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:24,032 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 01:20:24,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:24,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50252276] [2022-02-11 01:20:24,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50252276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:24,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772185464] [2022-02-11 01:20:24,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:20:24,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:24,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:24,034 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 01:20:24,034 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 01:20:24,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:20:24,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:24,128 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 01:20:24,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:24,212 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 01:20:24,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772185464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:24,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:24,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:20:24,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144824870] [2022-02-11 01:20:24,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:24,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:20:24,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:20:24,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:20:24,213 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 01:20:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:24,818 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-02-11 01:20:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:20:24,818 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 01:20:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:24,828 INFO L225 Difference]: With dead ends: 2256 [2022-02-11 01:20:24,828 INFO L226 Difference]: Without dead ends: 2256 [2022-02-11 01:20:24,829 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 01:20:24,829 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:24,830 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 154 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-02-11 01:20:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-02-11 01:20:24,860 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 01:20:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-02-11 01:20:24,863 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-02-11 01:20:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:24,863 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-02-11 01:20:24,863 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 01:20:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-02-11 01:20:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:24,865 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:24,865 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 01:20:24,885 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 01:20:25,079 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 01:20:25,080 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1014315128, now seen corresponding path program 13 times [2022-02-11 01:20:25,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:25,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193562740] [2022-02-11 01:20:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:25,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:25,134 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 01:20:25,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:25,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193562740] [2022-02-11 01:20:25,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193562740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:25,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677664245] [2022-02-11 01:20:25,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:20:25,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:25,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:25,136 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 01:20:25,137 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 01:20:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:25,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:25,244 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 01:20:25,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:25,291 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 01:20:25,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677664245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:25,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:25,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-11 01:20:25,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589340571] [2022-02-11 01:20:25,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:25,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:20:25,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:20:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:20:25,293 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 01:20:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:25,563 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-02-11 01:20:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:20:25,564 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 01:20:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:25,569 INFO L225 Difference]: With dead ends: 1611 [2022-02-11 01:20:25,569 INFO L226 Difference]: Without dead ends: 1611 [2022-02-11 01:20:25,570 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 01:20:25,570 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 217 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:25,571 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 110 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:20:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-02-11 01:20:25,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-02-11 01:20:25,595 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 01:20:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-02-11 01:20:25,599 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-02-11 01:20:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:25,599 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-02-11 01:20:25,599 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 01:20:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-02-11 01:20:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:25,602 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:25,602 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 01:20:25,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:25,811 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 01:20:25,811 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:25,812 INFO L85 PathProgramCache]: Analyzing trace with hash 581438524, now seen corresponding path program 14 times [2022-02-11 01:20:25,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:25,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809489081] [2022-02-11 01:20:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:25,854 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 01:20:25,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:25,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809489081] [2022-02-11 01:20:25,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809489081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:25,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778321320] [2022-02-11 01:20:25,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:25,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:25,855 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 01:20:25,856 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 01:20:25,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:25,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:25,942 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 01:20:25,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:26,013 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 01:20:26,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778321320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:26,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:26,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:20:26,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390607614] [2022-02-11 01:20:26,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:26,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:20:26,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:20:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:20:26,014 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 01:20:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:26,577 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-02-11 01:20:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:20:26,578 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 01:20:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:26,585 INFO L225 Difference]: With dead ends: 2408 [2022-02-11 01:20:26,585 INFO L226 Difference]: Without dead ends: 2404 [2022-02-11 01:20:26,586 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 01:20:26,586 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:26,586 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 168 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-02-11 01:20:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-02-11 01:20:26,619 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 01:20:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-02-11 01:20:26,622 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-02-11 01:20:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:26,623 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-02-11 01:20:26,623 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 01:20:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-02-11 01:20:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:26,626 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:26,626 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 01:20:26,651 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 01:20:26,848 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 01:20:26,849 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash 716068860, now seen corresponding path program 15 times [2022-02-11 01:20:26,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:26,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721655798] [2022-02-11 01:20:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:26,898 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 01:20:26,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:26,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721655798] [2022-02-11 01:20:26,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721655798] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:26,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616511683] [2022-02-11 01:20:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:26,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:26,900 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 01:20:26,929 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 01:20:26,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:20:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:26,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:27,047 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 01:20:27,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:27,145 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 01:20:27,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616511683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:27,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:27,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:20:27,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847767056] [2022-02-11 01:20:27,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:27,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:20:27,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:20:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:20:27,147 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 01:20:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:28,187 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-02-11 01:20:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 01:20:28,188 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 01:20:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:28,200 INFO L225 Difference]: With dead ends: 3509 [2022-02-11 01:20:28,201 INFO L226 Difference]: Without dead ends: 3509 [2022-02-11 01:20:28,202 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 01:20:28,202 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 571 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:28,203 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 240 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:20:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-02-11 01:20:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-02-11 01:20:28,271 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 01:20:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-02-11 01:20:28,275 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-02-11 01:20:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:28,275 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-02-11 01:20:28,275 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 01:20:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-02-11 01:20:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:28,279 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:28,279 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 01:20:28,304 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 01:20:28,492 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 01:20:28,493 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1935859282, now seen corresponding path program 16 times [2022-02-11 01:20:28,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:28,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145086650] [2022-02-11 01:20:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:28,543 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 01:20:28,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:28,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145086650] [2022-02-11 01:20:28,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145086650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:28,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269621534] [2022-02-11 01:20:28,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:28,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:28,545 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 01:20:28,546 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 01:20:28,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:28,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:28,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:28,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:28,671 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 01:20:28,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:28,751 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 01:20:28,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269621534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:28,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:28,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:20:28,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353914699] [2022-02-11 01:20:28,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:28,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:20:28,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:28,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:20:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:20:28,753 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 01:20:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:29,969 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-02-11 01:20:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:20:29,970 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 01:20:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:29,982 INFO L225 Difference]: With dead ends: 3211 [2022-02-11 01:20:29,982 INFO L226 Difference]: Without dead ends: 3207 [2022-02-11 01:20:29,984 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 01:20:29,985 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 512 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:29,985 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 251 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:20:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-02-11 01:20:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-02-11 01:20:30,027 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 01:20:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-02-11 01:20:30,031 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-02-11 01:20:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:30,031 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-02-11 01:20:30,032 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 01:20:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-02-11 01:20:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:30,037 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:30,037 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 01:20:30,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:30,260 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 01:20:30,260 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1446822462, now seen corresponding path program 3 times [2022-02-11 01:20:30,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:30,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198038629] [2022-02-11 01:20:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:30,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:30,295 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 01:20:30,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:30,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198038629] [2022-02-11 01:20:30,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198038629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:30,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360042484] [2022-02-11 01:20:30,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:30,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:30,296 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 01:20:30,297 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 01:20:30,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:20:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:20:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:30,383 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 01:20:30,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:30,445 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 01:20:30,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360042484] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:30,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:30,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-11 01:20:30,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770669205] [2022-02-11 01:20:30,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:30,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:20:30,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:20:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:20:30,446 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 01:20:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:30,571 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-02-11 01:20:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:20:30,572 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 01:20:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:30,575 INFO L225 Difference]: With dead ends: 1333 [2022-02-11 01:20:30,576 INFO L226 Difference]: Without dead ends: 1333 [2022-02-11 01:20:30,576 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 01:20:30,576 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:30,576 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:20:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-02-11 01:20:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-02-11 01:20:30,598 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 01:20:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-02-11 01:20:30,601 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-02-11 01:20:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:30,601 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-02-11 01:20:30,601 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 01:20:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-02-11 01:20:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:30,604 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:30,604 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 01:20:30,629 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 01:20:30,819 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 01:20:30,819 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1917945090, now seen corresponding path program 17 times [2022-02-11 01:20:30,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:30,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925415849] [2022-02-11 01:20:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:30,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:30,859 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 01:20:30,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:30,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925415849] [2022-02-11 01:20:30,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925415849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:30,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121168304] [2022-02-11 01:20:30,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:20:30,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:30,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:30,861 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 01:20:30,862 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 01:20:30,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:20:30,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:30,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:30,941 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 01:20:30,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:30,995 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 01:20:30,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121168304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:30,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:30,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:20:30,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336695367] [2022-02-11 01:20:30,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:30,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:20:30,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:30,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:20:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:20:30,997 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 01:20:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:31,363 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-02-11 01:20:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:20:31,364 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 01:20:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:31,370 INFO L225 Difference]: With dead ends: 2129 [2022-02-11 01:20:31,370 INFO L226 Difference]: Without dead ends: 2129 [2022-02-11 01:20:31,371 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 01:20:31,371 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:31,372 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 142 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-02-11 01:20:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-02-11 01:20:31,403 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 01:20:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-02-11 01:20:31,406 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-02-11 01:20:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:31,406 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-02-11 01:20:31,406 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 01:20:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-02-11 01:20:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:31,409 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:31,409 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 01:20:31,436 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 01:20:31,635 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 01:20:31,636 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -15265638, now seen corresponding path program 18 times [2022-02-11 01:20:31,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:31,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594164334] [2022-02-11 01:20:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:31,676 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 01:20:31,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:31,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594164334] [2022-02-11 01:20:31,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594164334] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:31,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85780903] [2022-02-11 01:20:31,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:20:31,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:31,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:31,678 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 01:20:31,700 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 01:20:31,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:20:31,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:31,772 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 01:20:31,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:31,837 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 01:20:31,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85780903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:31,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:31,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 01:20:31,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003807866] [2022-02-11 01:20:31,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:31,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:20:31,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:31,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:20:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:20:31,839 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 01:20:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:32,224 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-02-11 01:20:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:20:32,224 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 01:20:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:32,229 INFO L225 Difference]: With dead ends: 2262 [2022-02-11 01:20:32,229 INFO L226 Difference]: Without dead ends: 2262 [2022-02-11 01:20:32,229 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 01:20:32,229 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:32,230 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-02-11 01:20:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-02-11 01:20:32,275 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 01:20:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-02-11 01:20:32,278 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-02-11 01:20:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:32,278 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-02-11 01:20:32,278 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 01:20:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-02-11 01:20:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:32,282 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:32,282 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 01:20:32,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-11 01:20:32,495 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 01:20:32,495 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1098288294, now seen corresponding path program 19 times [2022-02-11 01:20:32,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:32,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555503063] [2022-02-11 01:20:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:32,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:20:32,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:32,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555503063] [2022-02-11 01:20:32,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555503063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:32,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241079552] [2022-02-11 01:20:32,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:20:32,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:32,538 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 01:20:32,563 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 01:20:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:32,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:32,664 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 01:20:32,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:32,715 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 01:20:32,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241079552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:32,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:32,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-11 01:20:32,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061563616] [2022-02-11 01:20:32,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:32,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:20:32,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:20:32,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:20:32,716 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 01:20:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:32,975 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-02-11 01:20:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 01:20:32,975 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 01:20:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:32,980 INFO L225 Difference]: With dead ends: 1474 [2022-02-11 01:20:32,980 INFO L226 Difference]: Without dead ends: 1464 [2022-02-11 01:20:32,980 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:20:32,981 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:32,981 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-02-11 01:20:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-02-11 01:20:33,003 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 01:20:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-02-11 01:20:33,007 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-02-11 01:20:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:33,007 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-02-11 01:20:33,008 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 01:20:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-02-11 01:20:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:33,011 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:33,011 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 01:20:33,035 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 01:20:33,234 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 01:20:33,234 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash -60086780, now seen corresponding path program 20 times [2022-02-11 01:20:33,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:33,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730345823] [2022-02-11 01:20:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:33,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:33,269 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 01:20:33,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:33,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730345823] [2022-02-11 01:20:33,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730345823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:33,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196604037] [2022-02-11 01:20:33,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:33,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:33,271 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 01:20:33,272 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 01:20:33,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:33,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:33,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:33,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:33,342 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 01:20:33,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:33,404 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 01:20:33,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196604037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:33,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:33,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 01:20:33,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665969175] [2022-02-11 01:20:33,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:33,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:20:33,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:20:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:20:33,405 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 01:20:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:33,705 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-02-11 01:20:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:20:33,706 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 01:20:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:33,712 INFO L225 Difference]: With dead ends: 2318 [2022-02-11 01:20:33,713 INFO L226 Difference]: Without dead ends: 2314 [2022-02-11 01:20:33,713 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:20:33,713 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:33,714 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 121 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-02-11 01:20:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-02-11 01:20:33,744 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 01:20:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-02-11 01:20:33,748 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-02-11 01:20:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:33,749 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-02-11 01:20:33,749 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 01:20:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-02-11 01:20:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:33,752 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:33,752 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 01:20:33,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:33,975 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 01:20:33,975 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 537249878, now seen corresponding path program 21 times [2022-02-11 01:20:33,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:33,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392339499] [2022-02-11 01:20:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:34,018 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 01:20:34,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:34,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392339499] [2022-02-11 01:20:34,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392339499] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:34,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711540321] [2022-02-11 01:20:34,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:34,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:34,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:34,021 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 01:20:34,021 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 01:20:34,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:20:34,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:34,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:34,093 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 01:20:34,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:34,146 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 01:20:34,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711540321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:34,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:34,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:20:34,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852354741] [2022-02-11 01:20:34,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:34,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:20:34,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:20:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:20:34,147 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 01:20:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:34,450 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-02-11 01:20:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 01:20:34,451 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 01:20:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:34,457 INFO L225 Difference]: With dead ends: 2302 [2022-02-11 01:20:34,457 INFO L226 Difference]: Without dead ends: 2290 [2022-02-11 01:20:34,458 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 01:20:34,458 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:34,458 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 124 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:20:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-02-11 01:20:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-02-11 01:20:34,489 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 01:20:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-02-11 01:20:34,493 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-02-11 01:20:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:34,493 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-02-11 01:20:34,493 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 01:20:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-02-11 01:20:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:34,496 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:34,496 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 01:20:34,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-11 01:20:34,710 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 01:20:34,711 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash 10829594, now seen corresponding path program 22 times [2022-02-11 01:20:34,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:34,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68582046] [2022-02-11 01:20:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:34,765 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 01:20:34,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:34,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68582046] [2022-02-11 01:20:34,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68582046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:34,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447811343] [2022-02-11 01:20:34,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:34,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:34,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:34,767 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 01:20:34,768 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 01:20:34,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:34,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:34,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:34,897 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 01:20:34,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:34,985 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 01:20:34,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447811343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:34,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:34,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:20:34,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591712700] [2022-02-11 01:20:34,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:34,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:20:34,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:20:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:20:34,986 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 01:20:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:35,862 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-02-11 01:20:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:20:35,863 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 01:20:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:35,876 INFO L225 Difference]: With dead ends: 4760 [2022-02-11 01:20:35,876 INFO L226 Difference]: Without dead ends: 4760 [2022-02-11 01:20:35,878 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 01:20:35,878 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 408 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:35,879 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 205 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:20:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-02-11 01:20:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-02-11 01:20:35,960 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 01:20:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-02-11 01:20:35,971 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-02-11 01:20:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:35,971 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-02-11 01:20:35,971 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 01:20:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-02-11 01:20:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:35,975 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:35,975 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 01:20:35,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-11 01:20:36,192 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 01:20:36,192 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 577781674, now seen corresponding path program 23 times [2022-02-11 01:20:36,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:36,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992743916] [2022-02-11 01:20:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:36,233 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 01:20:36,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:36,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992743916] [2022-02-11 01:20:36,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992743916] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:36,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400102601] [2022-02-11 01:20:36,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:20:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:36,235 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 01:20:36,236 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 01:20:36,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:20:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:36,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:36,352 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 01:20:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:36,440 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 01:20:36,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400102601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:36,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:36,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:20:36,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662015656] [2022-02-11 01:20:36,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:36,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:20:36,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:36,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:20:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:20:36,442 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 01:20:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:37,199 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-02-11 01:20:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:20:37,200 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 01:20:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:37,211 INFO L225 Difference]: With dead ends: 4260 [2022-02-11 01:20:37,211 INFO L226 Difference]: Without dead ends: 4260 [2022-02-11 01:20:37,212 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:20:37,212 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 452 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:37,212 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 199 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-02-11 01:20:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-02-11 01:20:37,270 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 01:20:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-02-11 01:20:37,274 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-02-11 01:20:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:37,275 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-02-11 01:20:37,275 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 01:20:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-02-11 01:20:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:37,278 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:37,278 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] [2022-02-11 01:20:37,302 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 01:20:37,493 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 01:20:37,493 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash -594564184, now seen corresponding path program 24 times [2022-02-11 01:20:37,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:37,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613965520] [2022-02-11 01:20:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:37,545 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 01:20:37,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:37,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613965520] [2022-02-11 01:20:37,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613965520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:37,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450202455] [2022-02-11 01:20:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:20:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:37,547 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 01:20:37,548 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 01:20:37,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:20:37,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:37,648 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 01:20:37,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:37,720 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 01:20:37,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450202455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:37,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:37,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-11 01:20:37,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32701323] [2022-02-11 01:20:37,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:37,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:20:37,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:20:37,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:20:37,722 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 01:20:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:38,406 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-02-11 01:20:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:20:38,407 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 01:20:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:38,418 INFO L225 Difference]: With dead ends: 4602 [2022-02-11 01:20:38,419 INFO L226 Difference]: Without dead ends: 4602 [2022-02-11 01:20:38,419 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:20:38,420 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 307 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:38,420 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 189 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-02-11 01:20:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-02-11 01:20:38,478 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 01:20:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-02-11 01:20:38,482 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-02-11 01:20:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:38,482 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-02-11 01:20:38,482 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 01:20:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-02-11 01:20:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:38,486 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:38,486 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] [2022-02-11 01:20:38,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-11 01:20:38,709 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 01:20:38,709 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash -513188096, now seen corresponding path program 25 times [2022-02-11 01:20:38,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:38,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047294254] [2022-02-11 01:20:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:38,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:38,758 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 01:20:38,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:38,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047294254] [2022-02-11 01:20:38,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047294254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:38,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458347792] [2022-02-11 01:20:38,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:20:38,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:38,759 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 01:20:38,760 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 01:20:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:38,853 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 01:20:38,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:38,931 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 01:20:38,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458347792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:38,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:38,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-11 01:20:38,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889742342] [2022-02-11 01:20:38,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:38,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:20:38,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:20:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:20:38,933 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 01:20:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:39,491 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-02-11 01:20:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:20:39,491 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 01:20:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:39,500 INFO L225 Difference]: With dead ends: 4348 [2022-02-11 01:20:39,500 INFO L226 Difference]: Without dead ends: 4344 [2022-02-11 01:20:39,501 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:20:39,501 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 387 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:39,502 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 153 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-02-11 01:20:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-02-11 01:20:39,556 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 01:20:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-02-11 01:20:39,561 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-02-11 01:20:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:39,561 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-02-11 01:20:39,561 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 01:20:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-02-11 01:20:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:39,564 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:39,564 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 01:20:39,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:39,775 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 01:20:39,775 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 417469120, now seen corresponding path program 26 times [2022-02-11 01:20:39,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:39,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007214831] [2022-02-11 01:20:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:39,828 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 01:20:39,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:39,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007214831] [2022-02-11 01:20:39,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007214831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:39,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651864531] [2022-02-11 01:20:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:39,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:39,830 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 01:20:39,862 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 01:20:39,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:39,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:39,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:39,959 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 01:20:39,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:40,056 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 01:20:40,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651864531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:40,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:40,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:20:40,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846621246] [2022-02-11 01:20:40,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:40,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:20:40,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:40,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:20:40,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:20:40,058 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 01:20:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:40,683 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-02-11 01:20:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:20:40,685 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 01:20:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:40,693 INFO L225 Difference]: With dead ends: 4035 [2022-02-11 01:20:40,693 INFO L226 Difference]: Without dead ends: 4035 [2022-02-11 01:20:40,694 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 01:20:40,694 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 416 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:40,694 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 206 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-02-11 01:20:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-02-11 01:20:40,735 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 01:20:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-02-11 01:20:40,738 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-02-11 01:20:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:40,738 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-02-11 01:20:40,738 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 01:20:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-02-11 01:20:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:40,741 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:40,741 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 01:20:40,757 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 01:20:40,941 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 01:20:40,942 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2060508274, now seen corresponding path program 27 times [2022-02-11 01:20:40,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:40,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876792489] [2022-02-11 01:20:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:40,989 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 01:20:40,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:40,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876792489] [2022-02-11 01:20:40,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876792489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:40,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408959355] [2022-02-11 01:20:40,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:40,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:40,991 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 01:20:40,995 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 01:20:41,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:20:41,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:41,106 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 01:20:41,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:41,186 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 01:20:41,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408959355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:41,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:41,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:20:41,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333975159] [2022-02-11 01:20:41,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:41,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:20:41,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:20:41,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:20:41,187 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 01:20:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:42,064 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-02-11 01:20:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:20:42,065 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 01:20:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:42,072 INFO L225 Difference]: With dead ends: 3794 [2022-02-11 01:20:42,073 INFO L226 Difference]: Without dead ends: 3790 [2022-02-11 01:20:42,073 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:20:42,074 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 332 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:42,074 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 201 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:20:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-02-11 01:20:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-02-11 01:20:42,120 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 01:20:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-02-11 01:20:42,124 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-02-11 01:20:42,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:42,124 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-02-11 01:20:42,124 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 01:20:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-02-11 01:20:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:42,126 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:42,127 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 01:20:42,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-11 01:20:42,327 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 01:20:42,327 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1231031038, now seen corresponding path program 28 times [2022-02-11 01:20:42,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:42,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131404991] [2022-02-11 01:20:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:42,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:42,366 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 01:20:42,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:42,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131404991] [2022-02-11 01:20:42,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131404991] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:42,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571583100] [2022-02-11 01:20:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:42,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:42,367 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 01:20:42,368 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 01:20:42,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:42,456 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 01:20:42,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:42,522 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 01:20:42,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571583100] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:42,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:42,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:20:42,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098112437] [2022-02-11 01:20:42,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:42,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:20:42,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:42,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:20:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:20:42,523 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 01:20:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:43,194 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-02-11 01:20:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:20:43,194 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 01:20:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:43,203 INFO L225 Difference]: With dead ends: 3978 [2022-02-11 01:20:43,203 INFO L226 Difference]: Without dead ends: 3978 [2022-02-11 01:20:43,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 01:20:43,204 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:43,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 190 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-02-11 01:20:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-02-11 01:20:43,251 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 01:20:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-02-11 01:20:43,256 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-02-11 01:20:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:43,257 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-02-11 01:20:43,257 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 01:20:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-02-11 01:20:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:43,261 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:43,261 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 01:20:43,285 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 01:20:43,483 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 01:20:43,484 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1149654950, now seen corresponding path program 29 times [2022-02-11 01:20:43,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:43,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968616803] [2022-02-11 01:20:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:43,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:43,531 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 01:20:43,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:43,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968616803] [2022-02-11 01:20:43,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968616803] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:43,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498589855] [2022-02-11 01:20:43,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:20:43,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:43,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:43,533 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 01:20:43,533 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 01:20:43,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:20:43,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:43,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:43,618 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 01:20:43,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:43,690 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 01:20:43,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498589855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:43,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:43,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:20:43,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517321636] [2022-02-11 01:20:43,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:43,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:20:43,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:43,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:20:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:20:43,691 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 01:20:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:44,229 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-02-11 01:20:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:20:44,230 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 01:20:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:44,253 INFO L225 Difference]: With dead ends: 3706 [2022-02-11 01:20:44,253 INFO L226 Difference]: Without dead ends: 3702 [2022-02-11 01:20:44,253 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:20:44,254 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:44,254 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 162 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-02-11 01:20:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-02-11 01:20:44,290 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 01:20:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-02-11 01:20:44,295 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-02-11 01:20:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-02-11 01:20:44,295 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 01:20:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-02-11 01:20:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:44,299 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:44,299 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 01:20:44,325 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 01:20:44,519 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 01:20:44,519 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1630220374, now seen corresponding path program 30 times [2022-02-11 01:20:44,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:44,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900201593] [2022-02-11 01:20:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:44,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:44,561 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 01:20:44,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:44,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900201593] [2022-02-11 01:20:44,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900201593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:44,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157850660] [2022-02-11 01:20:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:20:44,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:44,563 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 01:20:44,569 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 01:20:44,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:20:44,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:44,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:44,653 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 01:20:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:44,720 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 01:20:44,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157850660] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:44,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:44,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:20:44,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754935534] [2022-02-11 01:20:44,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:44,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:20:44,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:20:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:20:44,722 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 01:20:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:45,338 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-02-11 01:20:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:20:45,338 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 01:20:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:45,347 INFO L225 Difference]: With dead ends: 4114 [2022-02-11 01:20:45,347 INFO L226 Difference]: Without dead ends: 4102 [2022-02-11 01:20:45,347 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:20:45,347 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 238 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:45,348 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 209 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-02-11 01:20:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-02-11 01:20:45,396 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 01:20:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-02-11 01:20:45,400 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-02-11 01:20:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:45,400 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-02-11 01:20:45,400 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 01:20:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-02-11 01:20:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:45,403 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:45,403 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 01:20:45,419 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 01:20:45,603 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 01:20:45,604 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1067620206, now seen corresponding path program 31 times [2022-02-11 01:20:45,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:45,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965802235] [2022-02-11 01:20:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:45,652 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 01:20:45,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:45,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965802235] [2022-02-11 01:20:45,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965802235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:45,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056667841] [2022-02-11 01:20:45,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:20:45,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:45,654 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 01:20:45,654 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 01:20:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:45,763 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 01:20:45,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:45,849 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 01:20:45,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056667841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:45,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:45,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:20:45,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463361572] [2022-02-11 01:20:45,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:20:45,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:20:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:20:45,851 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 01:20:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:46,493 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-02-11 01:20:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:20:46,493 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 01:20:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:46,500 INFO L225 Difference]: With dead ends: 3694 [2022-02-11 01:20:46,500 INFO L226 Difference]: Without dead ends: 3694 [2022-02-11 01:20:46,501 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 01:20:46,501 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:46,501 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 240 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-02-11 01:20:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-02-11 01:20:46,539 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 01:20:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-02-11 01:20:46,545 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-02-11 01:20:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:46,546 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-02-11 01:20:46,546 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 01:20:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-02-11 01:20:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:46,550 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:46,550 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 01:20:46,577 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 01:20:46,774 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 01:20:46,774 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash 575418948, now seen corresponding path program 32 times [2022-02-11 01:20:46,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:46,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364980152] [2022-02-11 01:20:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:46,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:46,819 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 01:20:46,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:46,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364980152] [2022-02-11 01:20:46,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364980152] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:46,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066979596] [2022-02-11 01:20:46,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:20:46,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:46,821 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 01:20:46,844 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 01:20:46,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:20:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:46,933 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 01:20:46,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:47,023 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 01:20:47,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066979596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:47,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:47,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:20:47,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710557142] [2022-02-11 01:20:47,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:47,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:20:47,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:20:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:20:47,025 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 01:20:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:47,850 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-02-11 01:20:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:20:47,850 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 01:20:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:47,856 INFO L225 Difference]: With dead ends: 3420 [2022-02-11 01:20:47,856 INFO L226 Difference]: Without dead ends: 3416 [2022-02-11 01:20:47,856 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 01:20:47,857 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 387 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:47,857 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 211 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-02-11 01:20:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-02-11 01:20:47,889 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 01:20:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-02-11 01:20:47,892 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-02-11 01:20:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:47,892 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-02-11 01:20:47,892 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 01:20:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-02-11 01:20:47,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:20:47,895 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:47,895 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 01:20:47,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 01:20:48,095 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 01:20:48,096 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash -692038230, now seen corresponding path program 33 times [2022-02-11 01:20:48,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:48,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235824386] [2022-02-11 01:20:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:48,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:48,138 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 01:20:48,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:48,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235824386] [2022-02-11 01:20:48,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235824386] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:48,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320363419] [2022-02-11 01:20:48,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:20:48,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:48,139 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 01:20:48,140 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 01:20:48,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:20:48,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:20:48,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:48,231 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 01:20:48,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:48,301 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 01:20:48,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320363419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:48,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:48,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:20:48,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935419135] [2022-02-11 01:20:48,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:48,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:20:48,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:20:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:20:48,303 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 01:20:48,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:48,905 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-02-11 01:20:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:20:48,906 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 01:20:48,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:48,923 INFO L225 Difference]: With dead ends: 3256 [2022-02-11 01:20:48,923 INFO L226 Difference]: Without dead ends: 3244 [2022-02-11 01:20:48,924 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 01:20:48,924 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 261 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:48,924 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 193 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:20:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-02-11 01:20:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-02-11 01:20:48,954 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 01:20:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-02-11 01:20:48,958 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-02-11 01:20:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:48,958 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-02-11 01:20:48,958 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 01:20:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-02-11 01:20:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:20:48,961 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:48,961 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 01:20:48,977 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 01:20:49,163 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 01:20:49,163 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:49,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1837488904, now seen corresponding path program 4 times [2022-02-11 01:20:49,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:49,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351161243] [2022-02-11 01:20:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:49,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:49,377 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 01:20:49,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:49,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351161243] [2022-02-11 01:20:49,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351161243] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:49,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894947397] [2022-02-11 01:20:49,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:49,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:49,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:49,379 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 01:20:49,380 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 01:20:49,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:49,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:20:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:49,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:49,697 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 50 treesize of output 42 [2022-02-11 01:20:49,713 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:20:49,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 37 [2022-02-11 01:20:49,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:49,718 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 25 treesize of output 21 [2022-02-11 01:20:49,746 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 01:20:49,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:49,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:49,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:49,939 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 45 treesize of output 80 [2022-02-11 01:20:49,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:49,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-02-11 01:20:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:49,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:49,999 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 97 treesize of output 111 [2022-02-11 01:20:51,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:51,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:51,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:51,838 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 45 treesize of output 72 [2022-02-11 01:20:51,881 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:20:51,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:20:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:51,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:51,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:51,910 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 65 treesize of output 81 [2022-02-11 01:20:52,261 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 01:20:52,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894947397] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:52,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:52,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:20:52,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591100846] [2022-02-11 01:20:52,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:52,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:20:52,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:20:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:20:52,262 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:54,395 INFO L93 Difference]: Finished difference Result 3843 states and 12416 transitions. [2022-02-11 01:20:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 01:20:54,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:20:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:54,403 INFO L225 Difference]: With dead ends: 3843 [2022-02-11 01:20:54,403 INFO L226 Difference]: Without dead ends: 3813 [2022-02-11 01:20:54,403 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 01:20:54,403 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 485 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:54,404 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 270 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:20:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-02-11 01:20:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1792. [2022-02-11 01:20:54,436 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 01:20:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-02-11 01:20:54,441 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-02-11 01:20:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:54,441 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-02-11 01:20:54,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-02-11 01:20:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:20:54,444 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:54,444 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 01:20:54,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-11 01:20:54,644 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 01:20:54,645 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash 429080376, now seen corresponding path program 5 times [2022-02-11 01:20:54,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:54,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970415696] [2022-02-11 01:20:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:54,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:54,857 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 01:20:54,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:54,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970415696] [2022-02-11 01:20:54,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970415696] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:54,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724756790] [2022-02-11 01:20:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:20:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:54,869 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 01:20:54,870 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 01:20:54,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:20:54,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:20:54,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:20:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:55,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:55,171 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 48 treesize of output 40 [2022-02-11 01:20:55,185 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:20:55,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 35 [2022-02-11 01:20:55,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:20:55,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:20:55,238 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 01:20:55,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:20:55,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:55,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:55,447 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 46 treesize of output 81 [2022-02-11 01:20:55,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:55,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:20:55,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:55,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:55,504 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 97 treesize of output 111 [2022-02-11 01:20:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:56,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:56,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:56,762 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 45 treesize of output 72 [2022-02-11 01:20:56,802 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:20:56,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:20:56,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:20:56,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:20:56,823 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 65 treesize of output 81 [2022-02-11 01:20:57,243 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 01:20:57,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724756790] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:20:57,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:20:57,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:20:57,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225315177] [2022-02-11 01:20:57,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:20:57,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:20:57,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:20:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:20:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:20:57,244 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:20:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:20:59,332 INFO L93 Difference]: Finished difference Result 4012 states and 12890 transitions. [2022-02-11 01:20:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:20:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:20:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:20:59,340 INFO L225 Difference]: With dead ends: 4012 [2022-02-11 01:20:59,340 INFO L226 Difference]: Without dead ends: 3997 [2022-02-11 01:20:59,340 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=779, Invalid=3253, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 01:20:59,341 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 480 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:20:59,341 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 261 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1125 Invalid, 0 Unknown, 72 Unchecked, 0.7s Time] [2022-02-11 01:20:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2022-02-11 01:20:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 1801. [2022-02-11 01:20:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.5861111111111112) internal successors, (6455), 1800 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:20:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6455 transitions. [2022-02-11 01:20:59,392 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6455 transitions. Word has length 26 [2022-02-11 01:20:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:20:59,392 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 6455 transitions. [2022-02-11 01:20:59,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:20:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6455 transitions. [2022-02-11 01:20:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:20:59,395 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:20:59,395 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 01:20:59,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-11 01:20:59,595 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 01:20:59,596 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:20:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:20:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2020509684, now seen corresponding path program 34 times [2022-02-11 01:20:59,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:20:59,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454922761] [2022-02-11 01:20:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:20:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:20:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:20:59,900 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 01:20:59,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:20:59,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454922761] [2022-02-11 01:20:59,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454922761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:20:59,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115126242] [2022-02-11 01:20:59,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:20:59,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:20:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:20:59,901 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 01:20:59,902 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 01:20:59,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:20:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:20:59,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:20:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:00,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,236 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 47 treesize of output 37 [2022-02-11 01:21:00,255 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-02-11 01:21:00,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 33 [2022-02-11 01:21:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:00,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:21:00,293 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 01:21:00,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:00,487 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:21:00,488 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 49 treesize of output 74 [2022-02-11 01:21:00,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:00,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-02-11 01:21:00,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:00,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:00,540 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 103 treesize of output 107 [2022-02-11 01:21:01,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:01,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:01,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:01,135 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 50 treesize of output 38 [2022-02-11 01:21:01,161 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:21:01,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-02-11 01:21:01,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:01,175 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 17 treesize of output 11 [2022-02-11 01:21:01,269 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 01:21:01,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115126242] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:01,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:01,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 01:21:01,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488167544] [2022-02-11 01:21:01,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:01,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:21:01,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:01,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:21:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:21:01,270 INFO L87 Difference]: Start difference. First operand 1801 states and 6455 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 01:21:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:04,304 INFO L93 Difference]: Finished difference Result 3548 states and 11961 transitions. [2022-02-11 01:21:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:21:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 01:21:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:04,311 INFO L225 Difference]: With dead ends: 3548 [2022-02-11 01:21:04,312 INFO L226 Difference]: Without dead ends: 3533 [2022-02-11 01:21:04,312 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 01:21:04,313 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 322 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:04,313 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 322 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:21:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-02-11 01:21:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 1853. [2022-02-11 01:21:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.576133909287257) internal successors, (6623), 1852 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6623 transitions. [2022-02-11 01:21:04,358 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6623 transitions. Word has length 26 [2022-02-11 01:21:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:04,359 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6623 transitions. [2022-02-11 01:21:04,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 01:21:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6623 transitions. [2022-02-11 01:21:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:21:04,363 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:04,363 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 01:21:04,388 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 01:21:04,579 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 01:21:04,579 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1469410436, now seen corresponding path program 6 times [2022-02-11 01:21:04,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:04,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190032330] [2022-02-11 01:21:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:04,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:04,830 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 01:21:04,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:04,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190032330] [2022-02-11 01:21:04,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190032330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:04,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925315608] [2022-02-11 01:21:04,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:21:04,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:04,836 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 01:21:04,837 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 01:21:04,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:21:04,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:04,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:21:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:05,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:05,112 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 48 treesize of output 48 [2022-02-11 01:21:05,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:05,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-02-11 01:21:05,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:05,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:05,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-02-11 01:21:05,245 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 01:21:05,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:05,490 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:21:05,490 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 46 treesize of output 81 [2022-02-11 01:21:05,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:05,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:21:05,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:05,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:05,546 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 97 treesize of output 111 [2022-02-11 01:21:07,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:07,034 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 45 treesize of output 72 [2022-02-11 01:21:07,077 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:07,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:21:07,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:07,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:07,101 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 65 treesize of output 81 [2022-02-11 01:21:07,463 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 01:21:07,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925315608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:07,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:07,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-11 01:21:07,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155687710] [2022-02-11 01:21:07,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:07,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:21:07,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:21:07,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:21:07,464 INFO L87 Difference]: Start difference. First operand 1853 states and 6623 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 01:21:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:12,210 INFO L93 Difference]: Finished difference Result 4499 states and 14387 transitions. [2022-02-11 01:21:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 01:21:12,211 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 01:21:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:12,219 INFO L225 Difference]: With dead ends: 4499 [2022-02-11 01:21:12,219 INFO L226 Difference]: Without dead ends: 4469 [2022-02-11 01:21:12,220 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1151, Invalid=7405, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:21:12,220 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 557 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:12,220 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 650 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:21:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-02-11 01:21:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 1877. [2022-02-11 01:21:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.5794243070362475) internal successors, (6715), 1876 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6715 transitions. [2022-02-11 01:21:12,280 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6715 transitions. Word has length 26 [2022-02-11 01:21:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:12,281 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6715 transitions. [2022-02-11 01:21:12,281 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 01:21:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6715 transitions. [2022-02-11 01:21:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:21:12,284 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:12,284 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 01:21:12,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-11 01:21:12,489 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 01:21:12,489 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash 80971128, now seen corresponding path program 35 times [2022-02-11 01:21:12,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:12,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20578431] [2022-02-11 01:21:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:12,765 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 01:21:12,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:12,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20578431] [2022-02-11 01:21:12,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20578431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:12,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776433090] [2022-02-11 01:21:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:21:12,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:12,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:12,767 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 01:21:12,768 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 01:21:12,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:21:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:12,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:21:12,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:13,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:13,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:13,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:13,069 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 47 treesize of output 37 [2022-02-11 01:21:13,090 INFO L353 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2022-02-11 01:21:13,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 35 [2022-02-11 01:21:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:13,094 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 22 treesize of output 16 [2022-02-11 01:21:13,122 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 01:21:13,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:13,307 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:21:13,308 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 49 treesize of output 74 [2022-02-11 01:21:13,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:13,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-02-11 01:21:13,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:13,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:13,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:13,359 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 103 treesize of output 107 [2022-02-11 01:21:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:14,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:14,983 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 50 treesize of output 38 [2022-02-11 01:21:15,003 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:21:15,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-02-11 01:21:15,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:15,007 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 17 treesize of output 11 [2022-02-11 01:21:15,092 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 01:21:15,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776433090] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:15,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:15,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-02-11 01:21:15,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331366741] [2022-02-11 01:21:15,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:15,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:21:15,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:15,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:21:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:21:15,094 INFO L87 Difference]: Start difference. First operand 1877 states and 6715 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 01:21:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:19,096 INFO L93 Difference]: Finished difference Result 4376 states and 14404 transitions. [2022-02-11 01:21:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:21:19,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 01:21:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:19,105 INFO L225 Difference]: With dead ends: 4376 [2022-02-11 01:21:19,105 INFO L226 Difference]: Without dead ends: 4329 [2022-02-11 01:21:19,105 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1504, Invalid=7052, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:21:19,106 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 445 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:19,106 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 470 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:21:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2022-02-11 01:21:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 1914. [2022-02-11 01:21:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.5765812859383166) internal successors, (6842), 1913 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6842 transitions. [2022-02-11 01:21:19,168 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6842 transitions. Word has length 26 [2022-02-11 01:21:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:19,168 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 6842 transitions. [2022-02-11 01:21:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 01:21:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6842 transitions. [2022-02-11 01:21:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:21:19,173 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:19,173 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 01:21:19,197 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 01:21:19,391 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 01:21:19,391 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -895347716, now seen corresponding path program 36 times [2022-02-11 01:21:19,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:19,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148486075] [2022-02-11 01:21:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:19,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:19,660 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 01:21:19,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:19,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148486075] [2022-02-11 01:21:19,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148486075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:19,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463445183] [2022-02-11 01:21:19,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:21:19,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:19,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:19,664 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 01:21:19,712 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 01:21:19,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:21:19,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:21:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:20,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:20,007 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 56 treesize of output 74 [2022-02-11 01:21:20,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:20,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 124 [2022-02-11 01:21:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:20,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:20,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:20,058 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 151 treesize of output 145 [2022-02-11 01:21:22,737 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 01:21:22,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:22,933 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:21:22,933 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 49 treesize of output 74 [2022-02-11 01:21:22,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:22,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-02-11 01:21:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:22,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:22,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:22,989 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 103 treesize of output 107 [2022-02-11 01:21:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:25,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:25,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:25,108 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 50 treesize of output 38 [2022-02-11 01:21:25,128 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:21:25,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-02-11 01:21:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:25,131 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 17 treesize of output 11 [2022-02-11 01:21:25,218 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 01:21:25,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463445183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:25,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:25,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-02-11 01:21:25,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018275733] [2022-02-11 01:21:25,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:25,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:21:25,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:25,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:21:25,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:21:25,220 INFO L87 Difference]: Start difference. First operand 1914 states and 6842 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:36,589 INFO L93 Difference]: Finished difference Result 5648 states and 18021 transitions. [2022-02-11 01:21:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-02-11 01:21:36,590 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:21:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:36,600 INFO L225 Difference]: With dead ends: 5648 [2022-02-11 01:21:36,600 INFO L226 Difference]: Without dead ends: 5588 [2022-02-11 01:21:36,602 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15357 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=4191, Invalid=33639, Unknown=0, NotChecked=0, Total=37830 [2022-02-11 01:21:36,602 INFO L934 BasicCegarLoop]: 72 mSDtfsCounter, 755 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:36,602 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 922 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-11 01:21:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2022-02-11 01:21:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 2010. [2022-02-11 01:21:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.5614733698357393) internal successors, (7155), 2009 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7155 transitions. [2022-02-11 01:21:36,666 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7155 transitions. Word has length 26 [2022-02-11 01:21:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:36,666 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 7155 transitions. [2022-02-11 01:21:36,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7155 transitions. [2022-02-11 01:21:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:21:36,669 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:36,669 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 01:21:36,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-11 01:21:36,870 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 01:21:36,870 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:36,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash -713845664, now seen corresponding path program 7 times [2022-02-11 01:21:36,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:36,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680823151] [2022-02-11 01:21:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:37,092 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 01:21:37,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:37,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680823151] [2022-02-11 01:21:37,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680823151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:37,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865673049] [2022-02-11 01:21:37,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:21:37,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:37,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:37,096 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 01:21:37,118 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 01:21:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:21:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:37,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:37,481 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-02-11 01:21:37,498 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:21:37,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 40 [2022-02-11 01:21:37,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:37,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:21:37,539 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 01:21:37,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:37,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:37,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:37,736 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 46 treesize of output 81 [2022-02-11 01:21:37,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:37,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:21:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:37,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:37,812 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 97 treesize of output 111 [2022-02-11 01:21:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:39,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:39,695 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 45 treesize of output 72 [2022-02-11 01:21:39,759 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:39,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:21:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:39,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:39,780 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 65 treesize of output 81 [2022-02-11 01:21:40,106 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 01:21:40,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865673049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:40,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:40,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:21:40,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526112704] [2022-02-11 01:21:40,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:40,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:21:40,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:21:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:21:40,107 INFO L87 Difference]: Start difference. First operand 2010 states and 7155 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:21:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:41,731 INFO L93 Difference]: Finished difference Result 3994 states and 13061 transitions. [2022-02-11 01:21:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:21:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:21:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:41,740 INFO L225 Difference]: With dead ends: 3994 [2022-02-11 01:21:41,740 INFO L226 Difference]: Without dead ends: 3979 [2022-02-11 01:21:41,740 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=591, Invalid=2379, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 01:21:41,741 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 465 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:41,741 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 276 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1062 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2022-02-11 01:21:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-02-11 01:21:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2041. [2022-02-11 01:21:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.556862745098039) internal successors, (7256), 2040 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7256 transitions. [2022-02-11 01:21:41,784 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7256 transitions. Word has length 26 [2022-02-11 01:21:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:41,784 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7256 transitions. [2022-02-11 01:21:41,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:21:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7256 transitions. [2022-02-11 01:21:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:21:41,788 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:41,788 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 01:21:41,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-11 01:21:41,988 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 01:21:41,989 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2087213910, now seen corresponding path program 8 times [2022-02-11 01:21:41,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:41,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032225875] [2022-02-11 01:21:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:41,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:42,230 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 01:21:42,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:42,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032225875] [2022-02-11 01:21:42,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032225875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:42,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972962180] [2022-02-11 01:21:42,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:21:42,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:42,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:42,236 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 01:21:42,238 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 01:21:42,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:21:42,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:21:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:42,606 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-02-11 01:21:42,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 215 [2022-02-11 01:21:42,640 INFO L353 Elim1Store]: treesize reduction 39, result has 55.2 percent of original size [2022-02-11 01:21:42,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 132 [2022-02-11 01:21:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:42,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:42,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2022-02-11 01:21:42,780 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 01:21:42,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:43,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:43,054 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 46 treesize of output 73 [2022-02-11 01:21:43,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:43,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:21:43,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:43,110 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 97 treesize of output 103 [2022-02-11 01:21:43,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,451 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 45 treesize of output 35 [2022-02-11 01:21:43,471 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-02-11 01:21:43,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 35 [2022-02-11 01:21:43,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:43,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:21:43,606 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 01:21:43,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972962180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:43,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:43,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 01:21:43,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528763460] [2022-02-11 01:21:43,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:43,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:21:43,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:21:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:21:43,607 INFO L87 Difference]: Start difference. First operand 2041 states and 7256 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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 01:21:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:49,017 INFO L93 Difference]: Finished difference Result 4646 states and 15150 transitions. [2022-02-11 01:21:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 01:21:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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 01:21:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:49,026 INFO L225 Difference]: With dead ends: 4646 [2022-02-11 01:21:49,026 INFO L226 Difference]: Without dead ends: 4601 [2022-02-11 01:21:49,027 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1423, Invalid=8279, Unknown=0, NotChecked=0, Total=9702 [2022-02-11 01:21:49,027 INFO L934 BasicCegarLoop]: 52 mSDtfsCounter, 494 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1150 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:49,027 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 782 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2046 Invalid, 0 Unknown, 1150 Unchecked, 1.1s Time] [2022-02-11 01:21:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-02-11 01:21:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2094. [2022-02-11 01:21:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.560917343526039) internal successors, (7453), 2093 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7453 transitions. [2022-02-11 01:21:49,076 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7453 transitions. Word has length 26 [2022-02-11 01:21:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:49,076 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7453 transitions. [2022-02-11 01:21:49,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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 01:21:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7453 transitions. [2022-02-11 01:21:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:21:49,080 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:49,080 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 01:21:49,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-11 01:21:49,280 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 01:21:49,281 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1088334556, now seen corresponding path program 9 times [2022-02-11 01:21:49,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:49,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247345927] [2022-02-11 01:21:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:49,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:49,483 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 01:21:49,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:49,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247345927] [2022-02-11 01:21:49,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247345927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:49,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218774522] [2022-02-11 01:21:49,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:21:49,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:49,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:49,485 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 01:21:49,487 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 01:21:49,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:21:49,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:21:49,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:49,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:49,833 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 48 treesize of output 40 [2022-02-11 01:21:49,853 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:21:49,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 35 [2022-02-11 01:21:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:49,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:21:49,902 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 01:21:49,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:50,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:50,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:50,093 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 46 treesize of output 81 [2022-02-11 01:21:50,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:50,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:21:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:50,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:50,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-02-11 01:21:52,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:52,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:52,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:52,177 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 45 treesize of output 72 [2022-02-11 01:21:52,221 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:52,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:21:52,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:52,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:52,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:52,243 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 65 treesize of output 81 [2022-02-11 01:21:52,715 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 01:21:52,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218774522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:52,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:52,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:21:52,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134032555] [2022-02-11 01:21:52,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:52,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:21:52,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:21:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:21:52,716 INFO L87 Difference]: Start difference. First operand 2094 states and 7453 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:21:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:21:55,327 INFO L93 Difference]: Finished difference Result 4343 states and 14153 transitions. [2022-02-11 01:21:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:21:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:21:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:21:55,336 INFO L225 Difference]: With dead ends: 4343 [2022-02-11 01:21:55,337 INFO L226 Difference]: Without dead ends: 4328 [2022-02-11 01:21:55,337 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=957, Invalid=3735, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:21:55,337 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 531 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:21:55,338 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 314 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1190 Invalid, 0 Unknown, 291 Unchecked, 0.7s Time] [2022-02-11 01:21:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-02-11 01:21:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 2101. [2022-02-11 01:21:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 3.5642857142857145) internal successors, (7485), 2100 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:21:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 7485 transitions. [2022-02-11 01:21:55,389 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 7485 transitions. Word has length 26 [2022-02-11 01:21:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:21:55,389 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 7485 transitions. [2022-02-11 01:21:55,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:21:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 7485 transitions. [2022-02-11 01:21:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:21:55,394 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:21:55,394 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 01:21:55,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-11 01:21:55,610 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 01:21:55,611 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:21:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:21:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1589099960, now seen corresponding path program 10 times [2022-02-11 01:21:55,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:21:55,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71502463] [2022-02-11 01:21:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:21:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:21:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:21:55,856 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 01:21:55,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:21:55,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71502463] [2022-02-11 01:21:55,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71502463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:21:55,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685737375] [2022-02-11 01:21:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:21:55,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:21:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:21:55,858 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 01:21:55,859 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 01:21:55,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:21:55,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:21:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:21:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:21:56,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:56,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:56,125 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 45 treesize of output 45 [2022-02-11 01:21:56,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:56,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 61 [2022-02-11 01:21:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:21:56,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:56,154 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 67 treesize of output 63 [2022-02-11 01:21:56,255 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 01:21:56,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:21:56,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:56,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:56,448 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 46 treesize of output 81 [2022-02-11 01:21:56,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:56,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:21:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:56,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:56,504 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 97 treesize of output 111 [2022-02-11 01:21:57,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:57,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:57,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:57,209 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 45 treesize of output 72 [2022-02-11 01:21:57,253 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:21:57,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:21:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:57,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:21:57,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:21:57,278 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 65 treesize of output 81 [2022-02-11 01:21:57,833 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 01:21:57,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685737375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:21:57,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:21:57,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:21:57,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386546408] [2022-02-11 01:21:57,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:21:57,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:21:57,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:21:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:21:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:21:57,834 INFO L87 Difference]: Start difference. First operand 2101 states and 7485 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:01,047 INFO L93 Difference]: Finished difference Result 4739 states and 15412 transitions. [2022-02-11 01:22:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 01:22:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:22:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:01,058 INFO L225 Difference]: With dead ends: 4739 [2022-02-11 01:22:01,058 INFO L226 Difference]: Without dead ends: 4709 [2022-02-11 01:22:01,059 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 01:22:01,059 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 622 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:01,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 423 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1454 Invalid, 0 Unknown, 245 Unchecked, 0.8s Time] [2022-02-11 01:22:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4709 states. [2022-02-11 01:22:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4709 to 2096. [2022-02-11 01:22:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.562291169451074) internal successors, (7463), 2095 states have internal predecessors, (7463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7463 transitions. [2022-02-11 01:22:01,113 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7463 transitions. Word has length 26 [2022-02-11 01:22:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:01,113 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7463 transitions. [2022-02-11 01:22:01,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7463 transitions. [2022-02-11 01:22:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:01,117 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:01,117 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, 1, 1] [2022-02-11 01:22:01,134 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 01:22:01,318 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 01:22:01,318 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:01,318 INFO L85 PathProgramCache]: Analyzing trace with hash -455050340, now seen corresponding path program 11 times [2022-02-11 01:22:01,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:01,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276713923] [2022-02-11 01:22:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:01,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:01,556 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 01:22:01,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:01,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276713923] [2022-02-11 01:22:01,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276713923] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:01,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452235119] [2022-02-11 01:22:01,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:22:01,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:01,558 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 01:22:01,559 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 01:22:01,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:22:01,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:22:01,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:01,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:01,843 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 43 treesize of output 43 [2022-02-11 01:22:01,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:01,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 59 [2022-02-11 01:22:01,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:01,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:01,865 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 67 treesize of output 63 [2022-02-11 01:22:01,952 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 01:22:01,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:02,178 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:22:02,178 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 46 treesize of output 81 [2022-02-11 01:22:02,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:02,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:22:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:02,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:02,253 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 97 treesize of output 111 [2022-02-11 01:22:04,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:04,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:04,731 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 45 treesize of output 72 [2022-02-11 01:22:04,779 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:04,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:22:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:04,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:04,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:04,817 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 65 treesize of output 81 [2022-02-11 01:22:05,123 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 01:22:05,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452235119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:05,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:05,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-11 01:22:05,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073245477] [2022-02-11 01:22:05,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:05,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:22:05,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:22:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:22:05,124 INFO L87 Difference]: Start difference. First operand 2096 states and 7463 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 01:22:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:08,068 INFO L93 Difference]: Finished difference Result 4040 states and 13349 transitions. [2022-02-11 01:22:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:22:08,069 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 01:22:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:08,076 INFO L225 Difference]: With dead ends: 4040 [2022-02-11 01:22:08,076 INFO L226 Difference]: Without dead ends: 4010 [2022-02-11 01:22:08,077 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=663, Invalid=4307, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 01:22:08,077 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 281 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:08,077 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:22:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-02-11 01:22:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 2094. [2022-02-11 01:22:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.5618729096989967) internal successors, (7455), 2093 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7455 transitions. [2022-02-11 01:22:08,127 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7455 transitions. Word has length 26 [2022-02-11 01:22:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:08,128 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7455 transitions. [2022-02-11 01:22:08,128 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 01:22:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7455 transitions. [2022-02-11 01:22:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:08,131 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:08,131 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 01:22:08,147 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 01:22:08,332 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 01:22:08,332 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2073438884, now seen corresponding path program 12 times [2022-02-11 01:22:08,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:08,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143816981] [2022-02-11 01:22:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:08,589 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 01:22:08,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:08,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143816981] [2022-02-11 01:22:08,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143816981] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:08,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606263364] [2022-02-11 01:22:08,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:22:08,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:08,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:08,591 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 01:22:08,592 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 01:22:08,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:22:08,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:08,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:22:08,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:08,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:08,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:08,959 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 45 treesize of output 37 [2022-02-11 01:22:08,973 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:22:08,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2022-02-11 01:22:08,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-11 01:22:09,008 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 01:22:09,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:09,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:09,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:09,201 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 45 treesize of output 80 [2022-02-11 01:22:09,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:09,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-02-11 01:22:09,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:09,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:09,259 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 97 treesize of output 111 [2022-02-11 01:22:10,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:10,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:10,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:10,942 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 45 treesize of output 72 [2022-02-11 01:22:11,003 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:11,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:22:11,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:11,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:11,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:11,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-02-11 01:22:11,521 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 01:22:11,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606263364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:11,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:11,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-11 01:22:11,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170816324] [2022-02-11 01:22:11,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:11,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:22:11,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:22:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:22:11,522 INFO L87 Difference]: Start difference. First operand 2094 states and 7455 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:13,838 INFO L93 Difference]: Finished difference Result 4187 states and 13537 transitions. [2022-02-11 01:22:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:22:13,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:22:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:13,846 INFO L225 Difference]: With dead ends: 4187 [2022-02-11 01:22:13,846 INFO L226 Difference]: Without dead ends: 4095 [2022-02-11 01:22:13,847 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=615, Invalid=2691, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 01:22:13,847 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 277 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:13,847 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 397 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:22:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-02-11 01:22:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 2238. [2022-02-11 01:22:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.545820295037997) internal successors, (7932), 2237 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 7932 transitions. [2022-02-11 01:22:13,895 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 7932 transitions. Word has length 26 [2022-02-11 01:22:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:13,895 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 7932 transitions. [2022-02-11 01:22:13,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 7932 transitions. [2022-02-11 01:22:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:13,900 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:13,900 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 01:22:13,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-11 01:22:14,100 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 01:22:14,100 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash 560738446, now seen corresponding path program 13 times [2022-02-11 01:22:14,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:14,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579362349] [2022-02-11 01:22:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:14,355 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 01:22:14,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:14,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579362349] [2022-02-11 01:22:14,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579362349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:14,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707291972] [2022-02-11 01:22:14,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:22:14,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:14,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:14,357 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 01:22:14,357 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 01:22:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:22:14,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:14,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:14,630 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 50 treesize of output 42 [2022-02-11 01:22:14,644 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:22:14,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 37 [2022-02-11 01:22:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:14,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-11 01:22:14,686 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 01:22:14,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:14,889 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:22:14,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-02-11 01:22:14,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:14,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:22:14,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:14,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:14,947 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 97 treesize of output 111 [2022-02-11 01:22:17,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:17,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:17,587 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 45 treesize of output 72 [2022-02-11 01:22:17,632 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:17,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:22:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:17,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:17,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:17,654 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 65 treesize of output 81 [2022-02-11 01:22:17,982 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 01:22:17,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707291972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:17,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:17,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-11 01:22:17,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335727290] [2022-02-11 01:22:17,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:17,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:22:17,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:22:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:22:17,983 INFO L87 Difference]: Start difference. First operand 2238 states and 7932 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:22:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:21,103 INFO L93 Difference]: Finished difference Result 4478 states and 14711 transitions. [2022-02-11 01:22:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:22:21,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:22:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:21,113 INFO L225 Difference]: With dead ends: 4478 [2022-02-11 01:22:21,113 INFO L226 Difference]: Without dead ends: 4438 [2022-02-11 01:22:21,113 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=858, Invalid=4842, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 01:22:21,114 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 301 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:21,114 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 456 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:22:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-02-11 01:22:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 2306. [2022-02-11 01:22:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.547939262472885) internal successors, (8178), 2305 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8178 transitions. [2022-02-11 01:22:21,167 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8178 transitions. Word has length 26 [2022-02-11 01:22:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:21,168 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 8178 transitions. [2022-02-11 01:22:21,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:22:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8178 transitions. [2022-02-11 01:22:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:21,172 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:21,172 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 01:22:21,189 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 01:22:21,373 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 01:22:21,373 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:21,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:21,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1495978748, now seen corresponding path program 14 times [2022-02-11 01:22:21,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:21,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049851833] [2022-02-11 01:22:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:21,615 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 01:22:21,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049851833] [2022-02-11 01:22:21,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049851833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243433340] [2022-02-11 01:22:21,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:22:21,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:21,617 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 01:22:21,618 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 01:22:21,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:22:21,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:22:21,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:21,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:21,902 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 50 treesize of output 50 [2022-02-11 01:22:21,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:21,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 66 [2022-02-11 01:22:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:21,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:21,924 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 67 treesize of output 63 [2022-02-11 01:22:22,015 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 01:22:22,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:22,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:22,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:22,209 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 45 treesize of output 80 [2022-02-11 01:22:22,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:22,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-02-11 01:22:22,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:22,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:22,265 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 97 treesize of output 111 [2022-02-11 01:22:23,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:23,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:23,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:23,707 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 45 treesize of output 72 [2022-02-11 01:22:23,750 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:23,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:22:23,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:23,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:23,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:23,772 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 65 treesize of output 81 [2022-02-11 01:22:24,111 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 01:22:24,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243433340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:24,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:24,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-11 01:22:24,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118813594] [2022-02-11 01:22:24,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:24,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 01:22:24,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 01:22:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-11 01:22:24,112 INFO L87 Difference]: Start difference. First operand 2306 states and 8178 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:26,516 INFO L93 Difference]: Finished difference Result 4536 states and 14768 transitions. [2022-02-11 01:22:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:22:26,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:22:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:26,528 INFO L225 Difference]: With dead ends: 4536 [2022-02-11 01:22:26,528 INFO L226 Difference]: Without dead ends: 4447 [2022-02-11 01:22:26,529 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=932, Invalid=3898, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:22:26,529 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 412 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:26,529 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 225 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 856 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2022-02-11 01:22:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-02-11 01:22:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 2342. [2022-02-11 01:22:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 3.552755232806493) internal successors, (8317), 2341 states have internal predecessors, (8317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 8317 transitions. [2022-02-11 01:22:26,581 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 8317 transitions. Word has length 26 [2022-02-11 01:22:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 8317 transitions. [2022-02-11 01:22:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 8317 transitions. [2022-02-11 01:22:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:26,586 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:26,586 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 01:22:26,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-11 01:22:26,786 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 01:22:26,787 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash 961943836, now seen corresponding path program 15 times [2022-02-11 01:22:26,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:26,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553351288] [2022-02-11 01:22:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:26,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:27,034 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 01:22:27,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:27,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553351288] [2022-02-11 01:22:27,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553351288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:27,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127590594] [2022-02-11 01:22:27,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:22:27,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:27,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:27,040 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 01:22:27,041 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 01:22:27,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:22:27,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:27,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:22:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:28,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:28,815 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 48 treesize of output 40 [2022-02-11 01:22:28,829 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:22:28,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 35 [2022-02-11 01:22:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:28,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 01:22:28,867 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 01:22:28,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:29,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:29,105 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 84 treesize of output 117 [2022-02-11 01:22:29,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:29,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-02-11 01:22:29,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:29,183 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 91 treesize of output 115 [2022-02-11 01:22:33,366 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 01:22:33,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127590594] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:33,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:33,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:22:33,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570308337] [2022-02-11 01:22:33,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:33,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:22:33,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:22:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-02-11 01:22:33,367 INFO L87 Difference]: Start difference. First operand 2342 states and 8317 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:22:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:37,380 INFO L93 Difference]: Finished difference Result 4016 states and 13362 transitions. [2022-02-11 01:22:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:22:37,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:22:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:37,388 INFO L225 Difference]: With dead ends: 4016 [2022-02-11 01:22:37,388 INFO L226 Difference]: Without dead ends: 3983 [2022-02-11 01:22:37,389 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=594, Invalid=2483, Unknown=3, NotChecked=0, Total=3080 [2022-02-11 01:22:37,389 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:37,389 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 244 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 708 Invalid, 0 Unknown, 356 Unchecked, 0.4s Time] [2022-02-11 01:22:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-02-11 01:22:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 2371. [2022-02-11 01:22:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.5544303797468353) internal successors, (8424), 2370 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 8424 transitions. [2022-02-11 01:22:37,434 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 8424 transitions. Word has length 26 [2022-02-11 01:22:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:37,434 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 8424 transitions. [2022-02-11 01:22:37,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 01:22:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 8424 transitions. [2022-02-11 01:22:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:37,438 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:37,438 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 01:22:37,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-11 01:22:37,639 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 01:22:37,639 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash -655588944, now seen corresponding path program 16 times [2022-02-11 01:22:37,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:37,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647450648] [2022-02-11 01:22:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:37,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:37,876 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 01:22:37,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:37,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647450648] [2022-02-11 01:22:37,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647450648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:37,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847419225] [2022-02-11 01:22:37,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:22:37,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:37,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:37,880 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 01:22:37,881 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 01:22:37,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:22:37,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:37,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:22:37,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:38,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:38,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,176 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 48 treesize of output 48 [2022-02-11 01:22:38,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-02-11 01:22:38,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:38,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,202 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 67 treesize of output 63 [2022-02-11 01:22:38,303 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 01:22:38,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:38,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,500 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 46 treesize of output 81 [2022-02-11 01:22:38,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:22:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:38,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:38,558 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 97 treesize of output 111 [2022-02-11 01:22:39,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:39,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:39,685 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 45 treesize of output 72 [2022-02-11 01:22:39,730 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:39,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:22:39,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:39,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:39,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:39,754 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 65 treesize of output 81 [2022-02-11 01:22:40,214 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 01:22:40,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847419225] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:40,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:40,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:22:40,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883280738] [2022-02-11 01:22:40,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:40,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:22:40,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:22:40,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:22:40,215 INFO L87 Difference]: Start difference. First operand 2371 states and 8424 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:42,760 INFO L93 Difference]: Finished difference Result 4739 states and 15611 transitions. [2022-02-11 01:22:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 01:22:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:22:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:42,770 INFO L225 Difference]: With dead ends: 4739 [2022-02-11 01:22:42,770 INFO L226 Difference]: Without dead ends: 4695 [2022-02-11 01:22:42,770 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:22:42,771 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 490 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:42,771 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 283 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 881 Invalid, 0 Unknown, 339 Unchecked, 0.5s Time] [2022-02-11 01:22:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-02-11 01:22:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 2402. [2022-02-11 01:22:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 3.5622657226155767) internal successors, (8553), 2401 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 8553 transitions. [2022-02-11 01:22:42,835 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 8553 transitions. Word has length 26 [2022-02-11 01:22:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:42,835 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 8553 transitions. [2022-02-11 01:22:42,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 8553 transitions. [2022-02-11 01:22:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:42,840 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:42,840 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 01:22:42,856 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 01:22:43,040 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 01:22:43,040 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:43,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:43,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1949435448, now seen corresponding path program 17 times [2022-02-11 01:22:43,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:43,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136325901] [2022-02-11 01:22:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:43,276 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 01:22:43,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:43,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136325901] [2022-02-11 01:22:43,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136325901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:43,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062207029] [2022-02-11 01:22:43,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:22:43,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:43,277 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 01:22:43,278 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 01:22:43,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:22:43,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:22:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:45,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:45,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:45,759 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 48 treesize of output 48 [2022-02-11 01:22:45,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:45,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 64 [2022-02-11 01:22:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:45,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:45,781 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 67 treesize of output 63 [2022-02-11 01:22:45,901 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 01:22:45,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:46,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:46,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:46,107 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 45 treesize of output 80 [2022-02-11 01:22:46,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:46,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-02-11 01:22:46,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:46,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:46,165 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 97 treesize of output 111 [2022-02-11 01:22:46,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:46,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:46,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:46,819 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 45 treesize of output 72 [2022-02-11 01:22:46,861 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:22:46,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:22:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:46,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:46,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:46,883 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 65 treesize of output 81 [2022-02-11 01:22:47,535 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 01:22:47,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062207029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:22:47,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:22:47,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:22:47,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42933566] [2022-02-11 01:22:47,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:22:47,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:22:47,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:22:47,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:22:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2022-02-11 01:22:47,537 INFO L87 Difference]: Start difference. First operand 2402 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:22:50,421 INFO L93 Difference]: Finished difference Result 4699 states and 15443 transitions. [2022-02-11 01:22:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:22:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:22:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:22:50,430 INFO L225 Difference]: With dead ends: 4699 [2022-02-11 01:22:50,430 INFO L226 Difference]: Without dead ends: 4617 [2022-02-11 01:22:50,431 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1030, Invalid=5130, Unknown=2, NotChecked=0, Total=6162 [2022-02-11 01:22:50,431 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 410 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:22:50,431 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 331 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1217 Invalid, 0 Unknown, 378 Unchecked, 0.7s Time] [2022-02-11 01:22:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2022-02-11 01:22:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2487. [2022-02-11 01:22:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 3.5595333869670154) internal successors, (8849), 2486 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 8849 transitions. [2022-02-11 01:22:50,490 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 8849 transitions. Word has length 26 [2022-02-11 01:22:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:22:50,490 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 8849 transitions. [2022-02-11 01:22:50,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:22:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 8849 transitions. [2022-02-11 01:22:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:22:50,493 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:22:50,494 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 01:22:50,509 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 01:22:50,694 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 01:22:50,694 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:22:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:22:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash 702714798, now seen corresponding path program 18 times [2022-02-11 01:22:50,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:22:50,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200041314] [2022-02-11 01:22:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:22:50,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:22:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:22:50,915 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 01:22:50,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:22:50,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200041314] [2022-02-11 01:22:50,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200041314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:22:50,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054691618] [2022-02-11 01:22:50,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:22:50,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:22:50,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:22:50,917 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 01:22:50,917 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 01:22:50,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:22:50,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:22:50,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:22:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:22:52,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:22:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:52,572 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 53 treesize of output 45 [2022-02-11 01:22:52,586 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-02-11 01:22:52,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 40 [2022-02-11 01:22:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:22:52,590 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 20 treesize of output 16 [2022-02-11 01:22:52,619 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 01:22:52,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:22:52,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:52,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-02-11 01:22:52,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:52,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-02-11 01:22:52,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:22:52,870 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 91 treesize of output 115 [2022-02-11 01:23:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:23:25,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054691618] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:23:25,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:23:25,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 01:23:25,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392148121] [2022-02-11 01:23:25,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:23:25,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:23:25,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:23:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:23:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-02-11 01:23:25,650 INFO L87 Difference]: Start difference. First operand 2487 states and 8849 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:23:30,001 INFO L93 Difference]: Finished difference Result 4278 states and 14188 transitions. [2022-02-11 01:23:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 01:23:30,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:23:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:23:30,011 INFO L225 Difference]: With dead ends: 4278 [2022-02-11 01:23:30,011 INFO L226 Difference]: Without dead ends: 4245 [2022-02-11 01:23:30,012 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=609, Invalid=2580, Unknown=3, NotChecked=0, Total=3192 [2022-02-11 01:23:30,012 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 314 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:23:30,012 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 288 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 712 Invalid, 0 Unknown, 317 Unchecked, 0.4s Time] [2022-02-11 01:23:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2022-02-11 01:23:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 2488. [2022-02-11 01:23:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 3.560514676316848) internal successors, (8855), 2487 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 8855 transitions. [2022-02-11 01:23:30,063 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 8855 transitions. Word has length 26 [2022-02-11 01:23:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:23:30,063 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 8855 transitions. [2022-02-11 01:23:30,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 8855 transitions. [2022-02-11 01:23:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:23:30,067 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:23:30,068 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 01:23:30,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-11 01:23:30,268 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 01:23:30,268 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:23:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:23:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1481820314, now seen corresponding path program 19 times [2022-02-11 01:23:30,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:23:30,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689644220] [2022-02-11 01:23:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:23:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:23:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:23:30,482 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 01:23:30,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:23:30,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689644220] [2022-02-11 01:23:30,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689644220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:23:30,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758026604] [2022-02-11 01:23:30,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:23:30,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:23:30,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:23:30,484 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 01:23:30,484 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 01:23:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:23:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:23:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:23:30,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:30,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:30,772 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 43 treesize of output 43 [2022-02-11 01:23:30,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:30,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 59 [2022-02-11 01:23:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:30,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:30,795 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 67 treesize of output 63 [2022-02-11 01:23:30,896 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 01:23:30,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:23:31,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:31,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:31,117 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 46 treesize of output 81 [2022-02-11 01:23:31,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:31,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-02-11 01:23:31,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:31,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:31,175 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 97 treesize of output 111 [2022-02-11 01:23:34,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:34,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:34,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:34,488 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 45 treesize of output 72 [2022-02-11 01:23:34,531 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-02-11 01:23:34,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-02-11 01:23:34,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:34,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:34,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:34,563 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 65 treesize of output 81 [2022-02-11 01:23:34,960 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 01:23:34,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758026604] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:23:34,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:23:34,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 01:23:34,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322673155] [2022-02-11 01:23:34,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:23:34,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 01:23:34,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:23:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 01:23:34,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:23:34,961 INFO L87 Difference]: Start difference. First operand 2488 states and 8855 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:23:37,738 INFO L93 Difference]: Finished difference Result 4800 states and 15839 transitions. [2022-02-11 01:23:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:23:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:23:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:23:37,752 INFO L225 Difference]: With dead ends: 4800 [2022-02-11 01:23:37,752 INFO L226 Difference]: Without dead ends: 4764 [2022-02-11 01:23:37,753 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=966, Invalid=3726, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:23:37,753 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 495 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:23:37,753 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 304 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 921 Invalid, 0 Unknown, 199 Unchecked, 0.6s Time] [2022-02-11 01:23:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2022-02-11 01:23:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 2490. [2022-02-11 01:23:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 3.56046605062274) internal successors, (8862), 2489 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 8862 transitions. [2022-02-11 01:23:37,811 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 8862 transitions. Word has length 26 [2022-02-11 01:23:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:23:37,811 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 8862 transitions. [2022-02-11 01:23:37,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 8862 transitions. [2022-02-11 01:23:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:23:37,815 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:23:37,815 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 01:23:37,834 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 01:23:38,017 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 01:23:38,017 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:23:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:23:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2089528438, now seen corresponding path program 37 times [2022-02-11 01:23:38,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:23:38,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267839823] [2022-02-11 01:23:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:23:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:23:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:23:38,302 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 01:23:38,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:23:38,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267839823] [2022-02-11 01:23:38,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267839823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:23:38,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553942353] [2022-02-11 01:23:38,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:23:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:23:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:23:38,304 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 01:23:38,311 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 01:23:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:23:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:23:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:23:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:38,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:38,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:38,728 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 52 treesize of output 68 [2022-02-11 01:23:38,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:38,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 118 [2022-02-11 01:23:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:38,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:38,775 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 127 treesize of output 123 [2022-02-11 01:23:39,231 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 01:23:39,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:23:39,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:39,459 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 49 treesize of output 68 [2022-02-11 01:23:39,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:39,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-02-11 01:23:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:39,507 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 103 treesize of output 97 [2022-02-11 01:23:39,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:39,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 01:23:39,878 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:23:39,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 35 [2022-02-11 01:23:39,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:39,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:23:40,016 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 01:23:40,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553942353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:23:40,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:23:40,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 01:23:40,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492043673] [2022-02-11 01:23:40,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:23:40,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:23:40,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:23:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:23:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:23:40,018 INFO L87 Difference]: Start difference. First operand 2490 states and 8862 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:23:42,663 INFO L93 Difference]: Finished difference Result 4251 states and 14249 transitions. [2022-02-11 01:23:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:23:42,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 01:23:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:23:42,671 INFO L225 Difference]: With dead ends: 4251 [2022-02-11 01:23:42,671 INFO L226 Difference]: Without dead ends: 4206 [2022-02-11 01:23:42,672 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=809, Invalid=3883, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:23:42,672 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 342 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:23:42,672 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 308 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:23:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2022-02-11 01:23:42,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 2520. [2022-02-11 01:23:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 3.55577610162763) internal successors, (8957), 2519 states have internal predecessors, (8957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 8957 transitions. [2022-02-11 01:23:42,740 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 8957 transitions. Word has length 26 [2022-02-11 01:23:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:23:42,740 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 8957 transitions. [2022-02-11 01:23:42,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:23:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 8957 transitions. [2022-02-11 01:23:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:23:42,743 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:23:42,744 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 01:23:42,759 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 01:23:42,944 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 01:23:42,944 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:23:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:23:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -971763080, now seen corresponding path program 38 times [2022-02-11 01:23:42,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:23:42,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627046130] [2022-02-11 01:23:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:23:42,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:23:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:23:43,208 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 01:23:43,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:23:43,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627046130] [2022-02-11 01:23:43,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627046130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:23:43,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124525095] [2022-02-11 01:23:43,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:23:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:23:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:23:43,212 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 01:23:43,239 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 01:23:43,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:23:43,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:23:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:23:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:23:43,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:43,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:43,523 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 49 treesize of output 65 [2022-02-11 01:23:43,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:43,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 115 [2022-02-11 01:23:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:43,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:23:43,577 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 127 treesize of output 123 [2022-02-11 01:23:43,747 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 01:23:43,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:23:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:54,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:54,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:23:54,537 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 99 treesize of output 75 [2022-02-11 01:23:54,558 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-02-11 01:23:54,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 75 treesize of output 45 [2022-02-11 01:23:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:23:54,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-02-11 01:23:54,591 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 01:23:54,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124525095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:23:54,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:23:54,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-11 01:23:54,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710598667] [2022-02-11 01:23:54,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:23:54,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 01:23:54,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:23:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 01:23:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=500, Unknown=8, NotChecked=0, Total=600 [2022-02-11 01:23:54,593 INFO L87 Difference]: Start difference. First operand 2520 states and 8957 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 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 01:23:57,174 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3))) (< c_i c_N) (not (< c_k c_N))) (<= 0 c_M)) is different from false [2022-02-11 01:23:59,061 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* (- 1) (select (select c_mult (select c_A 1)) (select c_B 1))) c_res1) (select (select c_mult (select c_A 0)) (select c_B 0))) (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (= 2 c_i) (< 1 c_N) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M) (= c_res2 (let ((.cse4 (+ (- 1) c_k))) (select (select c_mult (select c_A .cse4)) (select c_B .cse4))))) is different from false [2022-02-11 01:24:00,548 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M)) is different from false [2022-02-11 01:24:19,652 WARN L228 SmtUtils]: Spent 15.54s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-11 01:24:44,662 WARN L228 SmtUtils]: Spent 16.11s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-11 01:25:11,701 WARN L228 SmtUtils]: Spent 14.32s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-11 01:25:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:25:11,831 INFO L93 Difference]: Finished difference Result 6301 states and 20785 transitions. [2022-02-11 01:25:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 01:25:11,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 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 01:25:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:25:11,843 INFO L225 Difference]: With dead ends: 6301 [2022-02-11 01:25:11,843 INFO L226 Difference]: Without dead ends: 6133 [2022-02-11 01:25:11,844 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=890, Invalid=5572, Unknown=30, NotChecked=480, Total=6972 [2022-02-11 01:25:11,844 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 364 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:25:11,844 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 547 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1869 Invalid, 0 Unknown, 416 Unchecked, 1.0s Time] [2022-02-11 01:25:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-02-11 01:25:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 2611. [2022-02-11 01:25:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.539463601532567) internal successors, (9238), 2610 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:25:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 9238 transitions. [2022-02-11 01:25:11,917 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 9238 transitions. Word has length 26 [2022-02-11 01:25:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:25:11,918 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 9238 transitions. [2022-02-11 01:25:11,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 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 01:25:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 9238 transitions. [2022-02-11 01:25:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 01:25:11,921 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:25:11,921 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 01:25:11,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-11 01:25:12,133 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 01:25:12,134 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:25:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:25:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash 96111484, now seen corresponding path program 39 times [2022-02-11 01:25:12,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:25:12,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503797646] [2022-02-11 01:25:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:25:12,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:25:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:25:12,384 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 01:25:12,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:25:12,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503797646] [2022-02-11 01:25:12,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503797646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:25:12,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117064731] [2022-02-11 01:25:12,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:25:12,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:25:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:25:12,386 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 01:25:12,388 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 01:25:12,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:25:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:25:12,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:25:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:25:12,819 INFO L353 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-02-11 01:25:12,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 225 [2022-02-11 01:25:12,858 INFO L353 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2022-02-11 01:25:12,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 151 [2022-02-11 01:25:12,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:25:12,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:25:12,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:25:12,872 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 67 treesize of output 71 Received shutdown request... [2022-02-11 01:32:26,943 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-11 01:32:26,945 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-11 01:32:26,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-11 01:32:26,967 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 01:32:26,967 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:32:27,146 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 01:32:27,146 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. [2022-02-11 01:32:27,148 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-11 01:32:27,148 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-11 01:32:27,148 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-11 01:32:27,151 INFO L733 BasicCegarLoop]: Path program histogram: [39, 19, 1, 1, 1] [2022-02-11 01:32:27,152 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:32:27,153 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:32:27,154 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:32:27 BasicIcfg [2022-02-11 01:32:27,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:32:27,155 INFO L158 Benchmark]: Toolchain (without parser) took 746858.62ms. Allocated memory was 177.2MB in the beginning and 443.5MB in the end (delta: 266.3MB). Free memory was 145.1MB in the beginning and 206.3MB in the end (delta: -61.1MB). Peak memory consumption was 303.5MB. Max. memory is 8.0GB. [2022-02-11 01:32:27,155 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.16ms. Allocated memory is still 177.2MB. Free memory is still 146.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:32:27,155 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.86ms. Allocated memory is still 177.2MB. Free memory was 145.1MB in the beginning and 143.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:32:27,155 INFO L158 Benchmark]: Boogie Preprocessor took 13.44ms. Allocated memory is still 177.2MB. Free memory was 143.6MB in the beginning and 142.7MB in the end (delta: 881.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:32:27,155 INFO L158 Benchmark]: RCFGBuilder took 256.71ms. Allocated memory is still 177.2MB. Free memory was 142.5MB in the beginning and 133.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-11 01:32:27,155 INFO L158 Benchmark]: TraceAbstraction took 746549.17ms. Allocated memory was 177.2MB in the beginning and 443.5MB in the end (delta: 266.3MB). Free memory was 132.7MB in the beginning and 206.3MB in the end (delta: -73.5MB). Peak memory consumption was 293.0MB. Max. memory is 8.0GB. [2022-02-11 01:32:27,162 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 0.16ms. Allocated memory is still 177.2MB. Free memory is still 146.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.86ms. Allocated memory is still 177.2MB. Free memory was 145.1MB in the beginning and 143.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.44ms. Allocated memory is still 177.2MB. Free memory was 143.6MB in the beginning and 142.7MB in the end (delta: 881.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 256.71ms. Allocated memory is still 177.2MB. Free memory was 142.5MB in the beginning and 133.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 746549.17ms. Allocated memory was 177.2MB in the beginning and 443.5MB in the end (delta: 266.3MB). Free memory was 132.7MB in the beginning and 206.3MB in the end (delta: -73.5MB). Peak memory consumption was 293.0MB. 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: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 2ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 746.4s, OverallIterations: 61, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.2s, AutomataDifference: 174.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19519 SdHoareTripleChecker+Valid, 27.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19519 mSDsluCounter, 14459 SdHoareTripleChecker+Invalid, 23.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4427 IncrementalHoareTripleChecker+Unchecked, 25530 mSDsCounter, 3947 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51087 IncrementalHoareTripleChecker+Invalid, 59461 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3947 mSolverCounterUnsat, 1424 mSDtfsCounter, 51087 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5461 GetRequests, 2127 SyntacticMatches, 165 SemanticMatches, 3169 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 79105 ImplicationChecksByTransitivity, 169.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2611occurred in iteration=60, InterpolantAutomatonStates: 2707, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 60 MinimizatonAttempts, 98568 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 120.1s InterpolantComputationTime, 2854 NumberOfCodeBlocks, 2848 NumberOfCodeBlocksAsserted, 180 NumberOfCheckSat, 4078 ConstructedInterpolants, 35 QuantifiedInterpolants, 59352 SizeOfPredicates, 654 NumberOfNonLiveVariables, 3533 ConjunctsInSsa, 846 ConjunctsInUnsatCore, 174 InterpolantComputations, 3 PerfectInterpolantSequences, 174/878 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