/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:45:49,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:45:49,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:45:49,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 16:45:49,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 16:45:49,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 16:45:49,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 16:45:49,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 16:45:49,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 16:45:49,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 16:45:49,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 16:45:49,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 16:45:49,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 16:45:49,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 16:45:49,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 16:45:49,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 16:45:49,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 16:45:49,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 16:45:49,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 16:45:49,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 16:45:49,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 16:45:49,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 16:45:49,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 16:45:49,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 16:45:49,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 16:45:49,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:45:49,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:45:49,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:45:49,429 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-Separate.epf [2022-01-18 16:45:49,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:45:49,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:45:49,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:45:49,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:45:49,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:45:49,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:45:49,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:45:49,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:45:49,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:45:49,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:45:49,444 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:45:49,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:45:49,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:45:49,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:45:49,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:45:49,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:45:49,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:45:49,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:45:49,445 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:45:49,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:45:49,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:45:49,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:45:49,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:45:49,614 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:45:49,615 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:45:49,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2022-01-18 16:45:49,616 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2022-01-18 16:45:49,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:45:49,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:45:49,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:45:49,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:45:49,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:45:49,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,657 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:45:49,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:45:49,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:45:49,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:45:49,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:45:49,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:45:49,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:45:49,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:45:49,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:45:49,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/1) ... [2022-01-18 16:45:49,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:45:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:49,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 16:45:49,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 16:45:49,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:45:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:45:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:45:49,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:45:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:45:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:45:49,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:45:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:45:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:45:49,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 16:45:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 16:45:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 16:45:49,743 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 16:45:49,777 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:45:49,778 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:45:49,917 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:45:49,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:45:49,953 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:45:49,954 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:45:49 BoogieIcfgContainer [2022-01-18 16:45:49,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:45:49,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:45:49,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:45:49,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:45:49,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:45:49" (1/2) ... [2022-01-18 16:45:49,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec1e644 and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:45:49, skipping insertion in model container [2022-01-18 16:45:49,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:45:49" (2/2) ... [2022-01-18 16:45:49,966 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2022-01-18 16:45:49,968 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:45:49,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:45:49,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:45:49,969 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:45:50,016 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 16:45:50,059 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:45:50,071 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 16:45:50,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 16:45:50,078 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2022-01-18 16:45:50,128 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 16:45:50,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:50,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:50,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1998239154, now seen corresponding path program 1 times [2022-01-18 16:45:50,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:50,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802361000] [2022-01-18 16:45:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:50,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:50,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:50,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802361000] [2022-01-18 16:45:50,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802361000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:45:50,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:45:50,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:45:50,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324770338] [2022-01-18 16:45:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:45:50,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:45:50,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:45:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:50,272 INFO L87 Difference]: Start difference. First operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:50,328 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2022-01-18 16:45:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:45:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 16:45:50,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:50,343 INFO L225 Difference]: With dead ends: 393 [2022-01-18 16:45:50,343 INFO L226 Difference]: Without dead ends: 393 [2022-01-18 16:45:50,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:50,348 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:50,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:45:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-18 16:45:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-01-18 16:45:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.951530612244898) internal successors, (1157), 392 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2022-01-18 16:45:50,455 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2022-01-18 16:45:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:50,456 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2022-01-18 16:45:50,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2022-01-18 16:45:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:45:50,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:50,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:50,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:45:50,460 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 492079791, now seen corresponding path program 1 times [2022-01-18 16:45:50,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:50,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184384330] [2022-01-18 16:45:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:50,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:50,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184384330] [2022-01-18 16:45:50,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184384330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:45:50,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:45:50,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:45:50,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914662899] [2022-01-18 16:45:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:45:50,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:45:50,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:45:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:50,493 INFO L87 Difference]: Start difference. First operand 393 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:50,519 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2022-01-18 16:45:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:45:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:45:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:50,523 INFO L225 Difference]: With dead ends: 442 [2022-01-18 16:45:50,523 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 16:45:50,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:50,524 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:50,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:45:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 16:45:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-01-18 16:45:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.9546485260770976) internal successors, (1303), 441 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2022-01-18 16:45:50,559 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2022-01-18 16:45:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:50,559 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2022-01-18 16:45:50,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2022-01-18 16:45:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:45:50,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:50,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:50,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:45:50,562 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 806798595, now seen corresponding path program 1 times [2022-01-18 16:45:50,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:50,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729695339] [2022-01-18 16:45:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:50,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:45:50,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:50,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729695339] [2022-01-18 16:45:50,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729695339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:45:50,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:45:50,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:45:50,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022964907] [2022-01-18 16:45:50,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:45:50,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:45:50,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:45:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:50,609 INFO L87 Difference]: Start difference. First operand 442 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:50,647 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2022-01-18 16:45:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:45:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:45:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:50,651 INFO L225 Difference]: With dead ends: 880 [2022-01-18 16:45:50,651 INFO L226 Difference]: Without dead ends: 588 [2022-01-18 16:45:50,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:50,657 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:50,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:45:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-18 16:45:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2022-01-18 16:45:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.9591439688715955) internal successors, (1521), 514 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2022-01-18 16:45:50,671 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2022-01-18 16:45:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:50,671 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2022-01-18 16:45:50,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2022-01-18 16:45:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:45:50,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:50,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:50,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:45:50,673 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1435505509, now seen corresponding path program 1 times [2022-01-18 16:45:50,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:50,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909227998] [2022-01-18 16:45:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:50,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:45:50,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:50,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909227998] [2022-01-18 16:45:50,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909227998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:50,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910140918] [2022-01-18 16:45:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:50,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:50,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:45:50,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 16:45:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:45:50,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:45:50,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:51,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 16:45:51,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:45:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:45:51,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910140918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:51,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:51,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-01-18 16:45:51,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722728781] [2022-01-18 16:45:51,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:51,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:45:51,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:51,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:45:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:45:51,178 INFO L87 Difference]: Start difference. First operand 515 states and 1521 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:51,429 INFO L93 Difference]: Finished difference Result 1649 states and 4903 transitions. [2022-01-18 16:45:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 16:45:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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 28 [2022-01-18 16:45:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:51,433 INFO L225 Difference]: With dead ends: 1649 [2022-01-18 16:45:51,434 INFO L226 Difference]: Without dead ends: 1033 [2022-01-18 16:45:51,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:45:51,434 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:51,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 185 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:45:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-01-18 16:45:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 773. [2022-01-18 16:45:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.966321243523316) internal successors, (2290), 772 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2290 transitions. [2022-01-18 16:45:51,468 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2290 transitions. Word has length 28 [2022-01-18 16:45:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:51,468 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2290 transitions. [2022-01-18 16:45:51,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2290 transitions. [2022-01-18 16:45:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:45:51,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:51,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:51,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 16:45:51,670 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 [2022-01-18 16:45:51,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1406640581, now seen corresponding path program 2 times [2022-01-18 16:45:51,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:51,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23676181] [2022-01-18 16:45:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:51,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:51,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:51,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23676181] [2022-01-18 16:45:51,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23676181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:45:51,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:45:51,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:45:51,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828540078] [2022-01-18 16:45:51,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:45:51,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:45:51,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:45:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:51,698 INFO L87 Difference]: Start difference. First operand 773 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:51,729 INFO L93 Difference]: Finished difference Result 616 states and 1811 transitions. [2022-01-18 16:45:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:45:51,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 16:45:51,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:51,731 INFO L225 Difference]: With dead ends: 616 [2022-01-18 16:45:51,731 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 16:45:51,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:45:51,732 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:51,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:45:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 16:45:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-18 16:45:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.9447154471544716) internal successors, (1811), 615 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1811 transitions. [2022-01-18 16:45:51,745 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1811 transitions. Word has length 28 [2022-01-18 16:45:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:51,746 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1811 transitions. [2022-01-18 16:45:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1811 transitions. [2022-01-18 16:45:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:45:51,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:51,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:51,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 16:45:51,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:51,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1436964612, now seen corresponding path program 3 times [2022-01-18 16:45:51,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:51,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321552584] [2022-01-18 16:45:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:51,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:45:51,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321552584] [2022-01-18 16:45:51,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321552584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963078734] [2022-01-18 16:45:51,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:45:51,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:51,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:45:51,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 16:45:51,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:45:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:45:51,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:52,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 16:45:52,220 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:45:52,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 16:45:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:45:52,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:52,636 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-18 16:45:52,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 70 [2022-01-18 16:45:52,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-01-18 16:45:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:45:52,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963078734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:52,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:52,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2022-01-18 16:45:52,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319379721] [2022-01-18 16:45:52,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:52,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:45:52,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:45:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:45:52,680 INFO L87 Difference]: Start difference. First operand 616 states and 1811 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:54,133 INFO L93 Difference]: Finished difference Result 2902 states and 8623 transitions. [2022-01-18 16:45:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:45:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:45:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:54,141 INFO L225 Difference]: With dead ends: 2902 [2022-01-18 16:45:54,141 INFO L226 Difference]: Without dead ends: 1998 [2022-01-18 16:45:54,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=883, Invalid=3947, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:45:54,143 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1175 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:54,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 306 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:45:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-01-18 16:45:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1029. [2022-01-18 16:45:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.9640077821011674) internal successors, (3047), 1028 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3047 transitions. [2022-01-18 16:45:54,172 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3047 transitions. Word has length 35 [2022-01-18 16:45:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:54,173 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3047 transitions. [2022-01-18 16:45:54,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3047 transitions. [2022-01-18 16:45:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:45:54,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:54,176 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:54,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 16:45:54,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 16:45:54,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash 899682228, now seen corresponding path program 4 times [2022-01-18 16:45:54,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:54,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100751495] [2022-01-18 16:45:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:54,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:45:54,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:54,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100751495] [2022-01-18 16:45:54,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100751495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:54,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857136541] [2022-01-18 16:45:54,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:45:54,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:54,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:54,456 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:45:54,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 16:45:54,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:45:54,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:45:54,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:54,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-18 16:45:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:45:54,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:54,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 16:45:54,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:45:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:45:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857136541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:54,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:54,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 5 [2022-01-18 16:45:54,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242809777] [2022-01-18 16:45:54,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:54,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:45:54,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:45:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:45:54,660 INFO L87 Difference]: Start difference. First operand 1029 states and 3047 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-01-18 16:45:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:54,694 INFO L93 Difference]: Finished difference Result 2681 states and 7863 transitions. [2022-01-18 16:45:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:45:54,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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 42 [2022-01-18 16:45:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:54,704 INFO L225 Difference]: With dead ends: 2681 [2022-01-18 16:45:54,704 INFO L226 Difference]: Without dead ends: 2651 [2022-01-18 16:45:54,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:45:54,705 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:54,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 83 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:45:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-01-18 16:45:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2233. [2022-01-18 16:45:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.027329749103943) internal successors, (6757), 2232 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2022-01-18 16:45:54,755 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 42 [2022-01-18 16:45:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:54,755 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2022-01-18 16:45:54,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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) [2022-01-18 16:45:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2022-01-18 16:45:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:45:54,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:54,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:54,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:45:54,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:54,976 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:45:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:45:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1081871720, now seen corresponding path program 5 times [2022-01-18 16:45:54,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:45:54,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566305366] [2022-01-18 16:45:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:45:54,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:45:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:45:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:55,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:45:55,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566305366] [2022-01-18 16:45:55,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566305366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:45:55,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164787755] [2022-01-18 16:45:55,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:45:55,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:45:55,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:45:55,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:45:55,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 16:45:55,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:45:55,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:45:55,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:45:55,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:45:55,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 16:45:55,659 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:45:55,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 99 [2022-01-18 16:45:55,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:45:55,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 108 [2022-01-18 16:45:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:55,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:45:56,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:45:56,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 16:45:56,390 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-01-18 16:45:56,390 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 115 treesize of output 133 [2022-01-18 16:45:56,408 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 16:45:56,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 118 [2022-01-18 16:45:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:45:56,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164787755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:45:56,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:45:56,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-18 16:45:56,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001234503] [2022-01-18 16:45:56,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:45:56,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:45:56,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:45:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:45:56,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:45:56,772 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:45:59,805 INFO L93 Difference]: Finished difference Result 6909 states and 20715 transitions. [2022-01-18 16:45:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:45:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:45:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:45:59,825 INFO L225 Difference]: With dead ends: 6909 [2022-01-18 16:45:59,825 INFO L226 Difference]: Without dead ends: 5504 [2022-01-18 16:45:59,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1420, Invalid=4900, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:45:59,827 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 933 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:45:59,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 1474 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:45:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2022-01-18 16:45:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3165. [2022-01-18 16:45:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3164 states have (on average 3.036030341340076) internal successors, (9606), 3164 states have internal predecessors, (9606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 9606 transitions. [2022-01-18 16:45:59,905 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 9606 transitions. Word has length 42 [2022-01-18 16:45:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:45:59,905 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 9606 transitions. [2022-01-18 16:45:59,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:45:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 9606 transitions. [2022-01-18 16:45:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:45:59,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:45:59,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:45:59,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-18 16:46:00,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:00,126 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:46:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:46:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash 318436278, now seen corresponding path program 6 times [2022-01-18 16:46:00,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:46:00,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100752346] [2022-01-18 16:46:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:46:00,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:46:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:00,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:46:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100752346] [2022-01-18 16:46:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100752346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:46:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079274228] [2022-01-18 16:46:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:46:00,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:00,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:46:00,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:46:00,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 16:46:00,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:46:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:46:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:46:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:46:00,755 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:46:00,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 16:46:00,932 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:46:00,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 16:46:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:46:00,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:46:01,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:46:01,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 101 [2022-01-18 16:46:01,602 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-01-18 16:46:01,603 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 100 treesize of output 108 [2022-01-18 16:46:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:46:01,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079274228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:46:01,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:46:01,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-01-18 16:46:01,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730545690] [2022-01-18 16:46:01,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:46:01,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:46:01,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:46:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:46:01,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:46:01,746 INFO L87 Difference]: Start difference. First operand 3165 states and 9606 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:46:14,467 INFO L93 Difference]: Finished difference Result 20247 states and 60887 transitions. [2022-01-18 16:46:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2022-01-18 16:46:14,467 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:46:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:46:14,517 INFO L225 Difference]: With dead ends: 20247 [2022-01-18 16:46:14,518 INFO L226 Difference]: Without dead ends: 18801 [2022-01-18 16:46:14,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42831 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=18579, Invalid=65231, Unknown=0, NotChecked=0, Total=83810 [2022-01-18 16:46:14,530 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2741 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:46:14,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 1130 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 16:46:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2022-01-18 16:46:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 7666. [2022-01-18 16:46:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7665 states have (on average 3.0841487279843443) internal successors, (23640), 7665 states have internal predecessors, (23640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 23640 transitions. [2022-01-18 16:46:14,752 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 23640 transitions. Word has length 42 [2022-01-18 16:46:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:46:14,753 INFO L470 AbstractCegarLoop]: Abstraction has 7666 states and 23640 transitions. [2022-01-18 16:46:14,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 23640 transitions. [2022-01-18 16:46:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:46:14,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:46:14,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:46:14,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 16:46:14,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:14,983 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:46:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:46:14,984 INFO L85 PathProgramCache]: Analyzing trace with hash -859641656, now seen corresponding path program 7 times [2022-01-18 16:46:14,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:46:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536512043] [2022-01-18 16:46:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:46:14,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:46:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:15,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:46:15,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536512043] [2022-01-18 16:46:15,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536512043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:46:15,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115876493] [2022-01-18 16:46:15,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:46:15,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:15,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:46:15,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:46:15,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 16:46:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:15,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:46:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:46:15,590 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:46:15,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 16:46:15,760 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:46:15,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2022-01-18 16:46:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:15,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:46:16,503 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-01-18 16:46:16,503 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 104 treesize of output 112 [2022-01-18 16:46:16,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:46:16,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-01-18 16:46:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:16,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115876493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:46:16,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:46:16,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 31 [2022-01-18 16:46:16,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169420330] [2022-01-18 16:46:16,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:46:16,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:46:16,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:46:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:46:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:46:16,623 INFO L87 Difference]: Start difference. First operand 7666 states and 23640 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:46:33,023 INFO L93 Difference]: Finished difference Result 27028 states and 81557 transitions. [2022-01-18 16:46:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-01-18 16:46:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:46:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:46:33,066 INFO L225 Difference]: With dead ends: 27028 [2022-01-18 16:46:33,066 INFO L226 Difference]: Without dead ends: 23716 [2022-01-18 16:46:33,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34994 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=14455, Invalid=60347, Unknown=0, NotChecked=0, Total=74802 [2022-01-18 16:46:33,070 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1855 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 3722 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:46:33,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 1881 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3722 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 16:46:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23716 states. [2022-01-18 16:46:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23716 to 7942. [2022-01-18 16:46:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 3.1081727742097973) internal successors, (24682), 7941 states have internal predecessors, (24682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 24682 transitions. [2022-01-18 16:46:33,283 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 24682 transitions. Word has length 42 [2022-01-18 16:46:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:46:33,283 INFO L470 AbstractCegarLoop]: Abstraction has 7942 states and 24682 transitions. [2022-01-18 16:46:33,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 31 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 24682 transitions. [2022-01-18 16:46:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:46:33,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:46:33,298 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:46:33,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 16:46:33,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:33,513 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:46:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:46:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash 251639076, now seen corresponding path program 8 times [2022-01-18 16:46:33,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:46:33,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929506929] [2022-01-18 16:46:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:46:33,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:46:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:33,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:46:33,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929506929] [2022-01-18 16:46:33,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929506929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:46:33,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868642840] [2022-01-18 16:46:33,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:46:33,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:33,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:46:33,714 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:46:33,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 16:46:33,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:46:33,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:46:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:46:33,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:46:33,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 16:46:34,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:46:34,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 142 [2022-01-18 16:46:34,273 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:46:34,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 93 [2022-01-18 16:46:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:34,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:46:35,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:46:35,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 16:46:35,344 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 16:46:35,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 130 [2022-01-18 16:46:35,382 INFO L353 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2022-01-18 16:46:35,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 127 [2022-01-18 16:46:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:35,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868642840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:46:35,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:46:35,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 16:46:35,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730968311] [2022-01-18 16:46:35,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:46:35,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:46:35,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:46:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:46:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:46:35,813 INFO L87 Difference]: Start difference. First operand 7942 states and 24682 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:46:40,917 INFO L93 Difference]: Finished difference Result 20315 states and 62151 transitions. [2022-01-18 16:46:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 16:46:40,918 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:46:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:46:40,974 INFO L225 Difference]: With dead ends: 20315 [2022-01-18 16:46:40,974 INFO L226 Difference]: Without dead ends: 17396 [2022-01-18 16:46:40,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6856 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3583, Invalid=13973, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 16:46:40,976 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1205 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:46:40,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1475 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:46:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17396 states. [2022-01-18 16:46:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17396 to 6922. [2022-01-18 16:46:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6922 states, 6921 states have (on average 3.072966334344748) internal successors, (21268), 6921 states have internal predecessors, (21268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 21268 transitions. [2022-01-18 16:46:41,136 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 21268 transitions. Word has length 42 [2022-01-18 16:46:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:46:41,136 INFO L470 AbstractCegarLoop]: Abstraction has 6922 states and 21268 transitions. [2022-01-18 16:46:41,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 21268 transitions. [2022-01-18 16:46:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:46:41,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:46:41,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:46:41,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 16:46:41,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:41,361 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:46:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:46:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2004363036, now seen corresponding path program 9 times [2022-01-18 16:46:41,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:46:41,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914908251] [2022-01-18 16:46:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:46:41,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:46:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:46:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:46:41,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:46:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914908251] [2022-01-18 16:46:41,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914908251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:46:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727998711] [2022-01-18 16:46:41,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:46:41,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:46:41,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:46:41,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:46:41,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 16:46:41,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:46:41,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:46:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:46:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:46:41,835 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:46:41,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 16:46:42,006 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:46:42,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2022-01-18 16:46:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:46:42,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:46:42,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:46:42,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 101 [2022-01-18 16:46:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:46:42,626 INFO L353 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-01-18 16:46:42,627 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 100 treesize of output 100 [2022-01-18 16:46:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:46:42,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727998711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:46:42,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:46:42,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 31 [2022-01-18 16:46:42,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633578502] [2022-01-18 16:46:42,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:46:42,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:46:42,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:46:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:46:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:46:42,733 INFO L87 Difference]: Start difference. First operand 6922 states and 21268 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:46:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:46:59,677 INFO L93 Difference]: Finished difference Result 35824 states and 108376 transitions. [2022-01-18 16:46:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-01-18 16:46:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:46:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:46:59,738 INFO L225 Difference]: With dead ends: 35824 [2022-01-18 16:46:59,739 INFO L226 Difference]: Without dead ends: 33657 [2022-01-18 16:46:59,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84786 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=32112, Invalid=127488, Unknown=0, NotChecked=0, Total=159600 [2022-01-18 16:46:59,746 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3017 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:46:59,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3017 Valid, 1516 Invalid, 4418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 16:46:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33657 states. [2022-01-18 16:47:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33657 to 10798. [2022-01-18 16:47:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10798 states, 10797 states have (on average 3.137075113457442) internal successors, (33871), 10797 states have internal predecessors, (33871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10798 states to 10798 states and 33871 transitions. [2022-01-18 16:47:00,206 INFO L78 Accepts]: Start accepts. Automaton has 10798 states and 33871 transitions. Word has length 42 [2022-01-18 16:47:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:00,206 INFO L470 AbstractCegarLoop]: Abstraction has 10798 states and 33871 transitions. [2022-01-18 16:47:00,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 10798 states and 33871 transitions. [2022-01-18 16:47:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:47:00,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:00,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:00,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:00,435 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,SelfDestructingSolverStorable11 [2022-01-18 16:47:00,436 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1846831292, now seen corresponding path program 10 times [2022-01-18 16:47:00,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:00,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064075911] [2022-01-18 16:47:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:00,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:00,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064075911] [2022-01-18 16:47:00,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064075911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:00,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075327352] [2022-01-18 16:47:00,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:47:00,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:00,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:47:00,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 16:47:00,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:47:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:47:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:00,961 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:47:00,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 16:47:01,085 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:47:01,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2022-01-18 16:47:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:01,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:01,832 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-01-18 16:47:01,832 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 104 treesize of output 112 [2022-01-18 16:47:01,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:01,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-01-18 16:47:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:01,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075327352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:01,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:01,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 32 [2022-01-18 16:47:01,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8688871] [2022-01-18 16:47:01,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:01,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:47:01,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:47:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:47:01,950 INFO L87 Difference]: Start difference. First operand 10798 states and 33871 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:27,455 INFO L93 Difference]: Finished difference Result 27482 states and 83508 transitions. [2022-01-18 16:47:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-01-18 16:47:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:47:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:27,512 INFO L225 Difference]: With dead ends: 27482 [2022-01-18 16:47:27,512 INFO L226 Difference]: Without dead ends: 25101 [2022-01-18 16:47:27,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 442 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97579 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=31327, Invalid=165365, Unknown=0, NotChecked=0, Total=196692 [2022-01-18 16:47:27,528 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 3310 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 4656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:27,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3310 Valid, 1652 Invalid, 4656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 16:47:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25101 states. [2022-01-18 16:47:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25101 to 9862. [2022-01-18 16:47:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9862 states, 9861 states have (on average 3.1219957407970793) internal successors, (30786), 9861 states have internal predecessors, (30786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9862 states to 9862 states and 30786 transitions. [2022-01-18 16:47:27,803 INFO L78 Accepts]: Start accepts. Automaton has 9862 states and 30786 transitions. Word has length 42 [2022-01-18 16:47:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:27,803 INFO L470 AbstractCegarLoop]: Abstraction has 9862 states and 30786 transitions. [2022-01-18 16:47:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9862 states and 30786 transitions. [2022-01-18 16:47:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 16:47:27,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:27,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:27,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:28,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 16:47:28,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash -287176812, now seen corresponding path program 11 times [2022-01-18 16:47:28,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:28,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037856915] [2022-01-18 16:47:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:28,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:28,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:28,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037856915] [2022-01-18 16:47:28,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037856915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:28,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045632005] [2022-01-18 16:47:28,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:47:28,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:28,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:28,275 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:47:28,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 16:47:28,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:47:28,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:28,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:47:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:28,382 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:47:28,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 16:47:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:47:28,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:28,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:28,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 101 [2022-01-18 16:47:28,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:47:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:47:28,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045632005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:28,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:28,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 27 [2022-01-18 16:47:28,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559896879] [2022-01-18 16:47:28,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:28,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:47:28,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:47:28,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:47:28,640 INFO L87 Difference]: Start difference. First operand 9862 states and 30786 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:31,813 INFO L93 Difference]: Finished difference Result 40668 states and 122041 transitions. [2022-01-18 16:47:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-18 16:47:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 16:47:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:31,890 INFO L225 Difference]: With dead ends: 40668 [2022-01-18 16:47:31,890 INFO L226 Difference]: Without dead ends: 40275 [2022-01-18 16:47:31,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9578 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4220, Invalid=19036, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 16:47:31,893 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1676 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:31,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 1199 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:47:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40275 states. [2022-01-18 16:47:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40275 to 10540. [2022-01-18 16:47:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10540 states, 10539 states have (on average 3.0748647879305437) internal successors, (32406), 10539 states have internal predecessors, (32406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10540 states to 10540 states and 32406 transitions. [2022-01-18 16:47:32,243 INFO L78 Accepts]: Start accepts. Automaton has 10540 states and 32406 transitions. Word has length 44 [2022-01-18 16:47:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:32,243 INFO L470 AbstractCegarLoop]: Abstraction has 10540 states and 32406 transitions. [2022-01-18 16:47:32,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 10540 states and 32406 transitions. [2022-01-18 16:47:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-18 16:47:32,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:32,259 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:32,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:32,467 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,SelfDestructingSolverStorable13 [2022-01-18 16:47:32,467 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:32,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1178577320, now seen corresponding path program 12 times [2022-01-18 16:47:32,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:32,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268268148] [2022-01-18 16:47:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:32,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:47:32,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268268148] [2022-01-18 16:47:32,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268268148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618367626] [2022-01-18 16:47:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:47:32,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:32,772 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:47:32,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 16:47:32,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:47:32,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:47:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:33,077 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:47:33,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 74 [2022-01-18 16:47:33,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:33,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:47:33,168 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 16:47:33,168 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 39 treesize of output 30 [2022-01-18 16:47:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:47:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:33,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 16:47:33,462 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:47:33,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2022-01-18 16:47:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:47:33,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618367626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:33,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:33,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 27 [2022-01-18 16:47:33,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049460451] [2022-01-18 16:47:33,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:33,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:47:33,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:47:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:47:33,510 INFO L87 Difference]: Start difference. First operand 10540 states and 32406 transitions. Second operand has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:49,765 INFO L93 Difference]: Finished difference Result 50637 states and 153811 transitions. [2022-01-18 16:47:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 424 states. [2022-01-18 16:47:49,766 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-18 16:47:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:49,857 INFO L225 Difference]: With dead ends: 50637 [2022-01-18 16:47:49,857 INFO L226 Difference]: Without dead ends: 46887 [2022-01-18 16:47:49,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95200 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=24936, Invalid=168224, Unknown=0, NotChecked=0, Total=193160 [2022-01-18 16:47:49,869 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 2585 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 4432 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 4432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:49,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 1306 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 4432 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 16:47:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46887 states. [2022-01-18 16:47:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46887 to 11459. [2022-01-18 16:47:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11459 states, 11458 states have (on average 3.062925466922674) internal successors, (35095), 11458 states have internal predecessors, (35095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11459 states to 11459 states and 35095 transitions. [2022-01-18 16:47:50,451 INFO L78 Accepts]: Start accepts. Automaton has 11459 states and 35095 transitions. Word has length 44 [2022-01-18 16:47:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:50,451 INFO L470 AbstractCegarLoop]: Abstraction has 11459 states and 35095 transitions. [2022-01-18 16:47:50,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 11459 states and 35095 transitions. [2022-01-18 16:47:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-18 16:47:50,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:50,475 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:50,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:50,690 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,SelfDestructingSolverStorable14 [2022-01-18 16:47:50,690 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1670748072, now seen corresponding path program 13 times [2022-01-18 16:47:50,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2956824] [2022-01-18 16:47:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:50,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:47:50,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2956824] [2022-01-18 16:47:50,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2956824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388826203] [2022-01-18 16:47:50,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:47:50,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:50,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:50,828 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:47:50,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 16:47:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:50,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:47:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 16:47:50,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-18 16:47:50,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388826203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:50,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:50,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-01-18 16:47:50,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529851170] [2022-01-18 16:47:50,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:50,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:47:50,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:47:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:47:50,988 INFO L87 Difference]: Start difference. First operand 11459 states and 35095 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:51,077 INFO L93 Difference]: Finished difference Result 25716 states and 78317 transitions. [2022-01-18 16:47:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:47:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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 46 [2022-01-18 16:47:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:51,123 INFO L225 Difference]: With dead ends: 25716 [2022-01-18 16:47:51,124 INFO L226 Difference]: Without dead ends: 25682 [2022-01-18 16:47:51,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:47:51,125 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:51,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 83 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:47:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2022-01-18 16:47:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 22310. [2022-01-18 16:47:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22310 states, 22309 states have (on average 3.1084315747007936) internal successors, (69346), 22309 states have internal predecessors, (69346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22310 states to 22310 states and 69346 transitions. [2022-01-18 16:47:51,448 INFO L78 Accepts]: Start accepts. Automaton has 22310 states and 69346 transitions. Word has length 46 [2022-01-18 16:47:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:51,449 INFO L470 AbstractCegarLoop]: Abstraction has 22310 states and 69346 transitions. [2022-01-18 16:47:51,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 22310 states and 69346 transitions. [2022-01-18 16:47:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 16:47:51,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:51,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:51,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 16:47:51,686 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,SelfDestructingSolverStorable15 [2022-01-18 16:47:51,686 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash 912464441, now seen corresponding path program 14 times [2022-01-18 16:47:51,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:51,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263326579] [2022-01-18 16:47:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:51,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:47:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:47:51,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:47:51,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263326579] [2022-01-18 16:47:51,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263326579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:47:51,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428387711] [2022-01-18 16:47:51,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:47:51,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:47:51,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:47:51,874 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:47:51,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 16:47:51,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:47:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:47:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:47:51,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:47:52,269 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:47:52,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 16:47:52,428 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:47:52,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 16:47:52,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:47:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:52,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:47:52,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:52,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 16:47:53,019 INFO L353 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2022-01-18 16:47:53,019 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 108 treesize of output 126 [2022-01-18 16:47:53,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:47:53,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2022-01-18 16:47:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:47:53,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428387711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:47:53,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:47:53,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-01-18 16:47:53,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483949625] [2022-01-18 16:47:53,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:47:53,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:47:53,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:47:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:47:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:47:53,245 INFO L87 Difference]: Start difference. First operand 22310 states and 69346 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:47:58,776 INFO L93 Difference]: Finished difference Result 58363 states and 177073 transitions. [2022-01-18 16:47:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-18 16:47:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 16:47:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:47:58,883 INFO L225 Difference]: With dead ends: 58363 [2022-01-18 16:47:58,884 INFO L226 Difference]: Without dead ends: 51234 [2022-01-18 16:47:58,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10776 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5550, Invalid=23180, Unknown=0, NotChecked=0, Total=28730 [2022-01-18 16:47:58,887 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 2375 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 4105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:47:58,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 1291 Invalid, 4105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 3496 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:47:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51234 states. [2022-01-18 16:47:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51234 to 25797. [2022-01-18 16:47:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25797 states, 25796 states have (on average 3.0408590479144055) internal successors, (78442), 25796 states have internal predecessors, (78442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25797 states to 25797 states and 78442 transitions. [2022-01-18 16:47:59,600 INFO L78 Accepts]: Start accepts. Automaton has 25797 states and 78442 transitions. Word has length 47 [2022-01-18 16:47:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:47:59,601 INFO L470 AbstractCegarLoop]: Abstraction has 25797 states and 78442 transitions. [2022-01-18 16:47:59,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:47:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25797 states and 78442 transitions. [2022-01-18 16:47:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 16:47:59,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:47:59,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:47:59,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 16:47:59,855 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,SelfDestructingSolverStorable16 [2022-01-18 16:47:59,855 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:47:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:47:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash 189048965, now seen corresponding path program 15 times [2022-01-18 16:47:59,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:47:59,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430019297] [2022-01-18 16:47:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:47:59,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:47:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:48:00,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:00,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430019297] [2022-01-18 16:48:00,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430019297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:00,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720383032] [2022-01-18 16:48:00,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:48:00,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:00,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:00,067 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:48:00,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 16:48:00,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:48:00,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:00,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:48:00,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:00,676 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:48:00,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 112 [2022-01-18 16:48:00,993 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 16:48:00,994 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 111 treesize of output 83 [2022-01-18 16:48:01,524 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:48:01,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:48:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:48:01,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:02,656 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:48:02,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 61 [2022-01-18 16:48:03,180 INFO L353 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-01-18 16:48:03,181 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 168 treesize of output 180 [2022-01-18 16:48:03,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:48:03,213 INFO L353 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-01-18 16:48:03,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 155 [2022-01-18 16:48:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:48:03,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720383032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:03,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:03,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 19] total 48 [2022-01-18 16:48:03,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154737816] [2022-01-18 16:48:03,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:03,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:48:03,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:48:03,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:48:03,823 INFO L87 Difference]: Start difference. First operand 25797 states and 78442 transitions. Second operand has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:19,468 INFO L93 Difference]: Finished difference Result 97112 states and 293648 transitions. [2022-01-18 16:48:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-18 16:48:19,468 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 16:48:19,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:19,795 INFO L225 Difference]: With dead ends: 97112 [2022-01-18 16:48:19,795 INFO L226 Difference]: Without dead ends: 84220 [2022-01-18 16:48:19,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27915 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=16169, Invalid=40713, Unknown=0, NotChecked=0, Total=56882 [2022-01-18 16:48:19,800 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1820 mSDsluCounter, 2720 mSDsCounter, 0 mSdLazyCounter, 5035 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 5618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 5035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:19,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 2100 Invalid, 5618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 5035 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 16:48:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84220 states. [2022-01-18 16:48:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84220 to 33391. [2022-01-18 16:48:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33391 states, 33390 states have (on average 3.055944893680743) internal successors, (102038), 33390 states have internal predecessors, (102038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33391 states to 33391 states and 102038 transitions. [2022-01-18 16:48:20,671 INFO L78 Accepts]: Start accepts. Automaton has 33391 states and 102038 transitions. Word has length 49 [2022-01-18 16:48:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:20,671 INFO L470 AbstractCegarLoop]: Abstraction has 33391 states and 102038 transitions. [2022-01-18 16:48:20,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 48 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 33391 states and 102038 transitions. [2022-01-18 16:48:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-18 16:48:20,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:20,717 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:20,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 16:48:20,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:20,927 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:48:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:20,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1519631584, now seen corresponding path program 16 times [2022-01-18 16:48:20,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:20,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407969680] [2022-01-18 16:48:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:20,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:21,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407969680] [2022-01-18 16:48:21,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407969680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956892551] [2022-01-18 16:48:21,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:48:21,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:21,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:21,307 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:48:21,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 16:48:21,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:48:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:48:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:21,565 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:48:21,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-18 16:48:21,620 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:48:21,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 16:48:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 16:48:21,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:21,911 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:48:21,911 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 96 treesize of output 120 [2022-01-18 16:48:21,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:48:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-18 16:48:22,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956892551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:22,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:22,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 32 [2022-01-18 16:48:22,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618642231] [2022-01-18 16:48:22,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:22,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:48:22,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:48:22,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:48:22,053 INFO L87 Difference]: Start difference. First operand 33391 states and 102038 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:28,459 INFO L93 Difference]: Finished difference Result 131426 states and 404962 transitions. [2022-01-18 16:48:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-01-18 16:48:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-18 16:48:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:28,768 INFO L225 Difference]: With dead ends: 131426 [2022-01-18 16:48:28,768 INFO L226 Difference]: Without dead ends: 114464 [2022-01-18 16:48:28,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19124 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8414, Invalid=35058, Unknown=0, NotChecked=0, Total=43472 [2022-01-18 16:48:28,771 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1640 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 3559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:28,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 1257 Invalid, 3559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:48:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114464 states. [2022-01-18 16:48:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114464 to 44522. [2022-01-18 16:48:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.0804564138271826) internal successors, (137145), 44521 states have internal predecessors, (137145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 137145 transitions. [2022-01-18 16:48:30,734 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 137145 transitions. Word has length 50 [2022-01-18 16:48:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:30,734 INFO L470 AbstractCegarLoop]: Abstraction has 44522 states and 137145 transitions. [2022-01-18 16:48:30,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 32 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 137145 transitions. [2022-01-18 16:48:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:48:30,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:30,984 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:31,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 16:48:31,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:31,184 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:48:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash -867515449, now seen corresponding path program 17 times [2022-01-18 16:48:31,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610338825] [2022-01-18 16:48:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:31,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 16:48:31,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610338825] [2022-01-18 16:48:31,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610338825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186095124] [2022-01-18 16:48:31,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:48:31,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:31,245 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:48:31,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 16:48:31,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-18 16:48:31,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:48:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:31,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:48:31,320 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 15 treesize of output 7 [2022-01-18 16:48:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 16:48:31,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:31,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:48:31,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 90 [2022-01-18 16:48:31,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:48:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 16:48:31,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186095124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:31,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:31,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 8 [2022-01-18 16:48:31,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803278869] [2022-01-18 16:48:31,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:31,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:48:31,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:48:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:48:31,473 INFO L87 Difference]: Start difference. First operand 44522 states and 137145 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:48:31,788 INFO L93 Difference]: Finished difference Result 53825 states and 165071 transitions. [2022-01-18 16:48:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:48:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 51 [2022-01-18 16:48:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:48:32,002 INFO L225 Difference]: With dead ends: 53825 [2022-01-18 16:48:32,003 INFO L226 Difference]: Without dead ends: 53723 [2022-01-18 16:48:32,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:48:32,003 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 133 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:48:32,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 159 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:48:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53723 states. [2022-01-18 16:48:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53723 to 51223. [2022-01-18 16:48:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51223 states, 51222 states have (on average 3.0916403108039514) internal successors, (158360), 51222 states have internal predecessors, (158360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51223 states to 51223 states and 158360 transitions. [2022-01-18 16:48:33,218 INFO L78 Accepts]: Start accepts. Automaton has 51223 states and 158360 transitions. Word has length 51 [2022-01-18 16:48:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:48:33,219 INFO L470 AbstractCegarLoop]: Abstraction has 51223 states and 158360 transitions. [2022-01-18 16:48:33,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:48:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 51223 states and 158360 transitions. [2022-01-18 16:48:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:48:33,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:48:33,472 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:48:33,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 16:48:33,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:33,673 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:48:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:48:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1449455409, now seen corresponding path program 18 times [2022-01-18 16:48:33,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:48:33,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567948014] [2022-01-18 16:48:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:48:33,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:48:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:48:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:48:34,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:48:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567948014] [2022-01-18 16:48:34,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567948014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:48:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574605611] [2022-01-18 16:48:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:48:34,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:48:34,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:48:34,072 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:48:34,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 16:48:34,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:48:34,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:48:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:48:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:48:34,309 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:48:34,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 16:48:34,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:48:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:48:34,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:48:34,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:48:34,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 16:48:34,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:48:34,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 121 [2022-01-18 16:48:34,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:48:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:48:34,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574605611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:48:34,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:48:34,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 33 [2022-01-18 16:48:34,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747698543] [2022-01-18 16:48:34,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:48:34,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:48:34,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:48:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:48:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:48:34,898 INFO L87 Difference]: Start difference. First operand 51223 states and 158360 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:03,495 INFO L93 Difference]: Finished difference Result 170953 states and 518659 transitions. [2022-01-18 16:49:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 648 states. [2022-01-18 16:49:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:49:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:04,054 INFO L225 Difference]: With dead ends: 170953 [2022-01-18 16:49:04,054 INFO L226 Difference]: Without dead ends: 168633 [2022-01-18 16:49:04,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213233 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=40465, Invalid=403757, Unknown=0, NotChecked=0, Total=444222 [2022-01-18 16:49:04,068 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2139 mSDsluCounter, 8948 mSDsCounter, 0 mSdLazyCounter, 11527 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 7126 SdHoareTripleChecker+Invalid, 12145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 11527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:04,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 7126 Invalid, 12145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 11527 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-18 16:49:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168633 states. [2022-01-18 16:49:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168633 to 80389. [2022-01-18 16:49:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80389 states, 80388 states have (on average 3.1265984972881524) internal successors, (251341), 80388 states have internal predecessors, (251341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80389 states to 80389 states and 251341 transitions. [2022-01-18 16:49:06,741 INFO L78 Accepts]: Start accepts. Automaton has 80389 states and 251341 transitions. Word has length 51 [2022-01-18 16:49:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 80389 states and 251341 transitions. [2022-01-18 16:49:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 80389 states and 251341 transitions. [2022-01-18 16:49:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:49:06,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:06,886 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:06,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:07,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:07,103 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:49:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 786519139, now seen corresponding path program 19 times [2022-01-18 16:49:07,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588441390] [2022-01-18 16:49:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:07,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:07,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588441390] [2022-01-18 16:49:07,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588441390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631688715] [2022-01-18 16:49:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:49:07,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:07,410 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:49:07,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 16:49:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:07,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:49:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:07,928 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:49:07,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 16:49:07,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:49:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:49:08,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:08,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:08,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 16:49:08,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 16:49:08,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:08,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 107 [2022-01-18 16:49:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:49:08,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631688715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:08,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:08,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 32 [2022-01-18 16:49:08,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729567202] [2022-01-18 16:49:08,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:08,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:49:08,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:49:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:49:08,270 INFO L87 Difference]: Start difference. First operand 80389 states and 251341 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:12,123 INFO L93 Difference]: Finished difference Result 130022 states and 401479 transitions. [2022-01-18 16:49:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-18 16:49:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:49:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:12,687 INFO L225 Difference]: With dead ends: 130022 [2022-01-18 16:49:12,687 INFO L226 Difference]: Without dead ends: 128613 [2022-01-18 16:49:12,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7970 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2148, Invalid=21108, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 16:49:12,688 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1051 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 3164 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 3561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 3164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:12,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 1555 Invalid, 3561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 3164 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:49:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128613 states. [2022-01-18 16:49:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128613 to 82939. [2022-01-18 16:49:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82939 states, 82938 states have (on average 3.098278231932287) internal successors, (256965), 82938 states have internal predecessors, (256965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82939 states to 82939 states and 256965 transitions. [2022-01-18 16:49:14,885 INFO L78 Accepts]: Start accepts. Automaton has 82939 states and 256965 transitions. Word has length 51 [2022-01-18 16:49:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:14,885 INFO L470 AbstractCegarLoop]: Abstraction has 82939 states and 256965 transitions. [2022-01-18 16:49:14,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 82939 states and 256965 transitions. [2022-01-18 16:49:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:49:15,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:15,005 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:15,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:15,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:15,220 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:49:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash 931116739, now seen corresponding path program 20 times [2022-01-18 16:49:15,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:15,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927554896] [2022-01-18 16:49:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:15,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:49:15,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:15,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927554896] [2022-01-18 16:49:15,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927554896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:15,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092938387] [2022-01-18 16:49:15,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:49:15,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:15,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:49:15,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 16:49:15,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:49:15,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:49:15,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:15,666 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:49:15,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 16:49:15,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:49:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:49:15,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:15,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:15,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 16:49:16,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:16,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 109 [2022-01-18 16:49:16,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:49:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:49:16,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092938387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:16,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:16,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-01-18 16:49:16,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973952312] [2022-01-18 16:49:16,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:16,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:49:16,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:49:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:49:16,162 INFO L87 Difference]: Start difference. First operand 82939 states and 256965 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:18,477 INFO L93 Difference]: Finished difference Result 139406 states and 427719 transitions. [2022-01-18 16:49:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:49:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:49:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:18,826 INFO L225 Difference]: With dead ends: 139406 [2022-01-18 16:49:18,826 INFO L226 Difference]: Without dead ends: 138710 [2022-01-18 16:49:18,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=454, Invalid=3328, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:49:18,827 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 440 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:18,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1085 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:49:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138710 states. [2022-01-18 16:49:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138710 to 83027. [2022-01-18 16:49:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83027 states, 83026 states have (on average 3.0981258882759617) internal successors, (257225), 83026 states have internal predecessors, (257225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83027 states to 83027 states and 257225 transitions. [2022-01-18 16:49:21,176 INFO L78 Accepts]: Start accepts. Automaton has 83027 states and 257225 transitions. Word has length 51 [2022-01-18 16:49:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:21,176 INFO L470 AbstractCegarLoop]: Abstraction has 83027 states and 257225 transitions. [2022-01-18 16:49:21,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 83027 states and 257225 transitions. [2022-01-18 16:49:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:49:21,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:21,290 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:21,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-18 16:49:21,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:21,508 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:49:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash 741648217, now seen corresponding path program 21 times [2022-01-18 16:49:21,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:21,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822389818] [2022-01-18 16:49:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:21,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-18 16:49:21,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822389818] [2022-01-18 16:49:21,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822389818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547056279] [2022-01-18 16:49:21,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:49:21,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:21,617 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:49:21,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 16:49:21,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:49:21,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:21,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:49:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:21,802 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:49:21,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 16:49:21,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:49:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:49:21,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:22,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:22,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 16:49:22,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:22,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 112 [2022-01-18 16:49:22,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:49:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:49:22,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547056279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:22,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:22,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-01-18 16:49:22,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699376919] [2022-01-18 16:49:22,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:22,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:49:22,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:49:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:49:22,439 INFO L87 Difference]: Start difference. First operand 83027 states and 257225 transitions. Second operand has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:30,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:30,427 INFO L93 Difference]: Finished difference Result 197704 states and 595244 transitions. [2022-01-18 16:49:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-01-18 16:49:30,427 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:49:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:31,416 INFO L225 Difference]: With dead ends: 197704 [2022-01-18 16:49:31,417 INFO L226 Difference]: Without dead ends: 193845 [2022-01-18 16:49:31,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32872 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8079, Invalid=68373, Unknown=0, NotChecked=0, Total=76452 [2022-01-18 16:49:31,420 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1817 mSDsluCounter, 3655 mSDsCounter, 0 mSdLazyCounter, 6238 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 6238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:31,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1817 Valid, 2594 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 6238 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 16:49:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193845 states. [2022-01-18 16:49:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193845 to 79515. [2022-01-18 16:49:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79515 states, 79514 states have (on average 3.0640390371506903) internal successors, (243634), 79514 states have internal predecessors, (243634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79515 states to 79515 states and 243634 transitions. [2022-01-18 16:49:34,169 INFO L78 Accepts]: Start accepts. Automaton has 79515 states and 243634 transitions. Word has length 51 [2022-01-18 16:49:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:34,170 INFO L470 AbstractCegarLoop]: Abstraction has 79515 states and 243634 transitions. [2022-01-18 16:49:34,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 79515 states and 243634 transitions. [2022-01-18 16:49:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 16:49:34,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:34,610 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:34,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:34,823 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,SelfDestructingSolverStorable23 [2022-01-18 16:49:34,823 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:49:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash -944128953, now seen corresponding path program 22 times [2022-01-18 16:49:34,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060316718] [2022-01-18 16:49:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:34,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:49:35,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060316718] [2022-01-18 16:49:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060316718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727798748] [2022-01-18 16:49:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:49:35,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:35,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:35,173 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:49:35,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 16:49:35,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:49:35,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:49:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:35,388 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:49:35,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-01-18 16:49:35,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:49:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:49:35,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:35,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:35,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 16:49:35,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:49:35,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 109 [2022-01-18 16:49:35,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:49:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:49:35,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727798748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:35,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:35,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 35 [2022-01-18 16:49:35,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568846109] [2022-01-18 16:49:35,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:35,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:49:35,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:35,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:49:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:49:35,902 INFO L87 Difference]: Start difference. First operand 79515 states and 243634 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:49:48,119 INFO L93 Difference]: Finished difference Result 144721 states and 440668 transitions. [2022-01-18 16:49:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 355 states. [2022-01-18 16:49:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 16:49:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:49:48,761 INFO L225 Difference]: With dead ends: 144721 [2022-01-18 16:49:48,761 INFO L226 Difference]: Without dead ends: 143470 [2022-01-18 16:49:48,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64962 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=13480, Invalid=132826, Unknown=0, NotChecked=0, Total=146306 [2022-01-18 16:49:48,765 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1670 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 7848 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 3057 SdHoareTripleChecker+Invalid, 8385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 7848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:49:48,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 3057 Invalid, 8385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 7848 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 16:49:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143470 states. [2022-01-18 16:49:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143470 to 69347. [2022-01-18 16:49:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69347 states, 69346 states have (on average 3.0609840509906845) internal successors, (212267), 69346 states have internal predecessors, (212267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69347 states to 69347 states and 212267 transitions. [2022-01-18 16:49:51,030 INFO L78 Accepts]: Start accepts. Automaton has 69347 states and 212267 transitions. Word has length 55 [2022-01-18 16:49:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:49:51,030 INFO L470 AbstractCegarLoop]: Abstraction has 69347 states and 212267 transitions. [2022-01-18 16:49:51,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:49:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 69347 states and 212267 transitions. [2022-01-18 16:49:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 16:49:51,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:49:51,159 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:49:51,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 16:49:51,361 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,SelfDestructingSolverStorable24 [2022-01-18 16:49:51,362 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:49:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:49:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash -332459897, now seen corresponding path program 23 times [2022-01-18 16:49:51,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:49:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334647257] [2022-01-18 16:49:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:49:51,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:49:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:49:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:49:51,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:49:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334647257] [2022-01-18 16:49:51,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334647257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:49:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223858701] [2022-01-18 16:49:51,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:49:51,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:49:51,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:49:51,650 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:49:51,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 16:49:51,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:49:51,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:49:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 16:49:51,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:49:51,914 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-01-18 16:49:51,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:49:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:49:51,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:49:52,240 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 16:49:52,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 105 [2022-01-18 16:49:52,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:49:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 16:49:52,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223858701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:49:52,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:49:52,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 30 [2022-01-18 16:49:52,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685106896] [2022-01-18 16:49:52,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:49:52,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:49:52,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:49:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:49:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:49:52,321 INFO L87 Difference]: Start difference. First operand 69347 states and 212267 transitions. Second operand has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:00,103 INFO L93 Difference]: Finished difference Result 242363 states and 739180 transitions. [2022-01-18 16:50:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-18 16:50:00,104 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 16:50:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:01,268 INFO L225 Difference]: With dead ends: 242363 [2022-01-18 16:50:01,268 INFO L226 Difference]: Without dead ends: 234109 [2022-01-18 16:50:01,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17601 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8221, Invalid=29999, Unknown=0, NotChecked=0, Total=38220 [2022-01-18 16:50:01,270 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1950 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1950 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:01,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1950 Valid, 1640 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:50:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234109 states. [2022-01-18 16:50:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234109 to 120881. [2022-01-18 16:50:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120881 states, 120880 states have (on average 3.071657842488418) internal successors, (371302), 120880 states have internal predecessors, (371302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120881 states to 120881 states and 371302 transitions. [2022-01-18 16:50:05,344 INFO L78 Accepts]: Start accepts. Automaton has 120881 states and 371302 transitions. Word has length 56 [2022-01-18 16:50:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:05,345 INFO L470 AbstractCegarLoop]: Abstraction has 120881 states and 371302 transitions. [2022-01-18 16:50:05,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 120881 states and 371302 transitions. [2022-01-18 16:50:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-18 16:50:06,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:06,033 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:06,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:50:06,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 16:50:06,248 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:50:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1980953451, now seen corresponding path program 24 times [2022-01-18 16:50:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946802518] [2022-01-18 16:50:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:06,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:50:06,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946802518] [2022-01-18 16:50:06,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946802518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489882648] [2022-01-18 16:50:06,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:50:06,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:06,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:06,432 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:50:06,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 16:50:06,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:50:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:50:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:50:06,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:06,958 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:50:06,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 92 [2022-01-18 16:50:07,094 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:50:07,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:50:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:50:07,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:07,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 16:50:07,501 INFO L353 Elim1Store]: treesize reduction 41, result has 32.8 percent of original size [2022-01-18 16:50:07,501 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 105 treesize of output 110 [2022-01-18 16:50:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:50:07,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489882648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:07,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:07,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 31 [2022-01-18 16:50:07,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885171851] [2022-01-18 16:50:07,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:07,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:50:07,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:50:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:50:07,574 INFO L87 Difference]: Start difference. First operand 120881 states and 371302 transitions. Second operand has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:50:14,835 INFO L93 Difference]: Finished difference Result 414058 states and 1277939 transitions. [2022-01-18 16:50:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-18 16:50:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-18 16:50:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:50:16,435 INFO L225 Difference]: With dead ends: 414058 [2022-01-18 16:50:16,435 INFO L226 Difference]: Without dead ends: 414058 [2022-01-18 16:50:16,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11922 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5874, Invalid=20858, Unknown=0, NotChecked=0, Total=26732 [2022-01-18 16:50:16,436 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1773 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:50:16,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1773 Valid, 1546 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:50:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414058 states. [2022-01-18 16:50:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414058 to 213658. [2022-01-18 16:50:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213658 states, 213657 states have (on average 3.151158164721961) internal successors, (673267), 213657 states have internal predecessors, (673267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213658 states to 213658 states and 673267 transitions. [2022-01-18 16:50:25,309 INFO L78 Accepts]: Start accepts. Automaton has 213658 states and 673267 transitions. Word has length 56 [2022-01-18 16:50:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:50:25,309 INFO L470 AbstractCegarLoop]: Abstraction has 213658 states and 673267 transitions. [2022-01-18 16:50:25,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.25) internal successors, (136), 31 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:50:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 213658 states and 673267 transitions. [2022-01-18 16:50:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-18 16:50:26,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:50:26,314 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:50:26,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 16:50:26,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:26,531 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:50:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:50:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1483575497, now seen corresponding path program 25 times [2022-01-18 16:50:26,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:50:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660629744] [2022-01-18 16:50:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:50:26,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:50:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:50:26,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:50:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660629744] [2022-01-18 16:50:26,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660629744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:50:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334247350] [2022-01-18 16:50:26,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:50:26,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:50:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:50:26,835 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:50:26,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 16:50:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:50:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:50:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:50:27,187 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:50:27,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2022-01-18 16:50:27,335 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:50:27,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:50:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:50:27,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:50:27,960 INFO L353 Elim1Store]: treesize reduction 58, result has 44.8 percent of original size [2022-01-18 16:50:27,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 145 [2022-01-18 16:50:27,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:50:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:50:28,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334247350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:50:28,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:50:28,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 35 [2022-01-18 16:50:28,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235691861] [2022-01-18 16:50:28,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:50:28,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:50:28,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:50:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:50:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:50:28,287 INFO L87 Difference]: Start difference. First operand 213658 states and 673267 transitions. Second operand has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:01,303 INFO L93 Difference]: Finished difference Result 687845 states and 2146853 transitions. [2022-01-18 16:51:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 641 states. [2022-01-18 16:51:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-01-18 16:51:01,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:05,157 INFO L225 Difference]: With dead ends: 687845 [2022-01-18 16:51:05,157 INFO L226 Difference]: Without dead ends: 655736 [2022-01-18 16:51:05,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223493 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=52945, Invalid=389945, Unknown=0, NotChecked=0, Total=442890 [2022-01-18 16:51:05,171 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 2583 mSDsluCounter, 3618 mSDsCounter, 0 mSdLazyCounter, 6733 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2583 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 7569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 6733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:05,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2583 Valid, 2645 Invalid, 7569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 6733 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-18 16:51:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655736 states. [2022-01-18 16:51:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655736 to 253244. [2022-01-18 16:51:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253244 states, 253243 states have (on average 3.1467720726732824) internal successors, (796898), 253243 states have internal predecessors, (796898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253244 states to 253244 states and 796898 transitions. [2022-01-18 16:51:16,393 INFO L78 Accepts]: Start accepts. Automaton has 253244 states and 796898 transitions. Word has length 58 [2022-01-18 16:51:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:16,393 INFO L470 AbstractCegarLoop]: Abstraction has 253244 states and 796898 transitions. [2022-01-18 16:51:16,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 253244 states and 796898 transitions. [2022-01-18 16:51:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-18 16:51:17,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:17,793 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:17,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:51:18,008 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,SelfDestructingSolverStorable27 [2022-01-18 16:51:18,008 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:51:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash 393506375, now seen corresponding path program 26 times [2022-01-18 16:51:18,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930338552] [2022-01-18 16:51:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:18,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:51:18,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930338552] [2022-01-18 16:51:18,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930338552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396107408] [2022-01-18 16:51:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:51:18,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:18,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:18,576 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:51:18,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 16:51:18,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:51:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 16:51:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:18,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 16:51:20,783 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-01-18 16:51:20,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 203 [2022-01-18 16:51:20,789 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-01-18 16:51:20,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 183 treesize of output 129 [2022-01-18 16:51:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:51:20,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:22,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:51:22,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-18 16:51:23,524 INFO L353 Elim1Store]: treesize reduction 224, result has 24.1 percent of original size [2022-01-18 16:51:23,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 333 [2022-01-18 16:51:23,578 INFO L353 Elim1Store]: treesize reduction 160, result has 26.3 percent of original size [2022-01-18 16:51:23,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 271 treesize of output 271 [2022-01-18 16:51:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:51:28,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396107408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:28,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:28,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:51:28,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478264162] [2022-01-18 16:51:28,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:28,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:51:28,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:28,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:51:28,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1847, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:51:28,230 INFO L87 Difference]: Start difference. First operand 253244 states and 796898 transitions. Second operand has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:51:36,719 INFO L93 Difference]: Finished difference Result 533549 states and 1682724 transitions. [2022-01-18 16:51:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:51:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-18 16:51:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:51:39,590 INFO L225 Difference]: With dead ends: 533549 [2022-01-18 16:51:39,590 INFO L226 Difference]: Without dead ends: 514642 [2022-01-18 16:51:39,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4431 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2850, Invalid=9140, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 16:51:39,592 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1494 mSDsluCounter, 3412 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:51:39,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 2772 Invalid, 3998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 16:51:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514642 states. [2022-01-18 16:51:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514642 to 269198. [2022-01-18 16:51:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269198 states, 269197 states have (on average 3.1812241592588326) internal successors, (856376), 269197 states have internal predecessors, (856376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269198 states to 269198 states and 856376 transitions. [2022-01-18 16:51:49,325 INFO L78 Accepts]: Start accepts. Automaton has 269198 states and 856376 transitions. Word has length 60 [2022-01-18 16:51:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:51:49,325 INFO L470 AbstractCegarLoop]: Abstraction has 269198 states and 856376 transitions. [2022-01-18 16:51:49,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:51:49,325 INFO L276 IsEmpty]: Start isEmpty. Operand 269198 states and 856376 transitions. [2022-01-18 16:51:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 16:51:50,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:51:50,573 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:51:50,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 16:51:50,791 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,SelfDestructingSolverStorable28 [2022-01-18 16:51:50,791 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:51:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:51:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash -925999780, now seen corresponding path program 27 times [2022-01-18 16:51:50,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:51:50,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636890075] [2022-01-18 16:51:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:51:50,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:51:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:51:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:51:51,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:51:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636890075] [2022-01-18 16:51:51,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636890075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:51:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090142678] [2022-01-18 16:51:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:51:51,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:51:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:51:51,111 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:51:51,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 16:51:51,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:51:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:51:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 16:51:51,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:51:51,743 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:51:51,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 94 [2022-01-18 16:51:51,855 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:51:51,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:51:51,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:51:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:51:51,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:51:51,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:51:51,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 16:51:52,501 INFO L353 Elim1Store]: treesize reduction 26, result has 57.4 percent of original size [2022-01-18 16:51:52,502 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 105 treesize of output 125 [2022-01-18 16:51:52,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-01-18 16:51:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 73 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:51:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090142678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:51:52,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:51:52,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 43 [2022-01-18 16:51:52,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400938206] [2022-01-18 16:51:52,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:51:52,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:51:52,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:51:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:51:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:51:52,692 INFO L87 Difference]: Start difference. First operand 269198 states and 856376 transitions. Second operand has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:52:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:52:32,922 INFO L93 Difference]: Finished difference Result 1067781 states and 3316648 transitions. [2022-01-18 16:52:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 787 states. [2022-01-18 16:52:32,922 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 16:52:32,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:52:37,813 INFO L225 Difference]: With dead ends: 1067781 [2022-01-18 16:52:37,813 INFO L226 Difference]: Without dead ends: 1046327 [2022-01-18 16:52:37,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 797 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302870 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=34104, Invalid=603498, Unknown=0, NotChecked=0, Total=637602 [2022-01-18 16:52:37,838 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 3684 mSDsluCounter, 13789 mSDsCounter, 0 mSdLazyCounter, 13820 mSolverCounterSat, 1444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3684 SdHoareTripleChecker+Valid, 11790 SdHoareTripleChecker+Invalid, 15264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1444 IncrementalHoareTripleChecker+Valid, 13820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:52:37,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3684 Valid, 11790 Invalid, 15264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1444 Valid, 13820 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-01-18 16:52:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046327 states. [2022-01-18 16:53:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046327 to 483292. [2022-01-18 16:53:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483292 states, 483291 states have (on average 3.199956134088986) internal successors, (1546510), 483291 states have internal predecessors, (1546510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:53:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483292 states to 483292 states and 1546510 transitions. [2022-01-18 16:53:06,345 INFO L78 Accepts]: Start accepts. Automaton has 483292 states and 1546510 transitions. Word has length 61 [2022-01-18 16:53:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:53:06,345 INFO L470 AbstractCegarLoop]: Abstraction has 483292 states and 1546510 transitions. [2022-01-18 16:53:06,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:53:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 483292 states and 1546510 transitions. [2022-01-18 16:53:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 16:53:07,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:53:07,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:53:07,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 16:53:08,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:53:08,103 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:53:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:53:08,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1239501488, now seen corresponding path program 28 times [2022-01-18 16:53:08,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:53:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274181447] [2022-01-18 16:53:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:53:08,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:53:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:53:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:53:08,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:53:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274181447] [2022-01-18 16:53:08,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274181447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:53:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062084732] [2022-01-18 16:53:08,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:53:08,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:53:08,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:53:08,620 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:53:08,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 16:53:08,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:53:08,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:53:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-18 16:53:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:53:09,257 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:53:09,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-01-18 16:53:09,771 INFO L353 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2022-01-18 16:53:09,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 190 [2022-01-18 16:53:09,792 INFO L353 Elim1Store]: treesize reduction 93, result has 11.4 percent of original size [2022-01-18 16:53:09,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 191 [2022-01-18 16:53:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:53:10,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:53:11,726 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:53:11,726 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 50 treesize of output 72 [2022-01-18 16:53:12,641 INFO L353 Elim1Store]: treesize reduction 86, result has 43.0 percent of original size [2022-01-18 16:53:12,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 253 treesize of output 283 [2022-01-18 16:53:12,742 INFO L353 Elim1Store]: treesize reduction 118, result has 45.6 percent of original size [2022-01-18 16:53:12,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 214 treesize of output 274 [2022-01-18 16:53:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:53:41,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062084732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:53:41,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:53:41,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 52 [2022-01-18 16:53:41,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899979911] [2022-01-18 16:53:41,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:53:41,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:53:41,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:53:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:53:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:53:41,826 INFO L87 Difference]: Start difference. First operand 483292 states and 1546510 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:54:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:54:22,935 INFO L93 Difference]: Finished difference Result 968722 states and 3055036 transitions. [2022-01-18 16:54:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-01-18 16:54:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 16:54:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:54:28,922 INFO L225 Difference]: With dead ends: 968722 [2022-01-18 16:54:28,923 INFO L226 Difference]: Without dead ends: 940187 [2022-01-18 16:54:28,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41896 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=12613, Invalid=90749, Unknown=0, NotChecked=0, Total=103362 [2022-01-18 16:54:28,929 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 1794 mSDsluCounter, 6390 mSDsCounter, 0 mSdLazyCounter, 9391 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 5338 SdHoareTripleChecker+Invalid, 9937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 9391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:54:28,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 5338 Invalid, 9937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 9391 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-18 16:54:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940187 states. [2022-01-18 16:54:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940187 to 598862. [2022-01-18 16:54:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598862 states, 598861 states have (on average 3.176900816717068) internal successors, (1902522), 598861 states have internal predecessors, (1902522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:54:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598862 states to 598862 states and 1902522 transitions. [2022-01-18 16:54:55,682 INFO L78 Accepts]: Start accepts. Automaton has 598862 states and 1902522 transitions. Word has length 61 [2022-01-18 16:54:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:54:55,682 INFO L470 AbstractCegarLoop]: Abstraction has 598862 states and 1902522 transitions. [2022-01-18 16:54:55,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:54:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 598862 states and 1902522 transitions. [2022-01-18 16:54:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 16:54:57,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:54:57,050 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:54:57,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 16:54:57,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:54:57,267 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:54:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:54:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -720227254, now seen corresponding path program 29 times [2022-01-18 16:54:57,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:54:57,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741920561] [2022-01-18 16:54:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:54:57,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:54:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:54:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:54:57,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:54:57,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741920561] [2022-01-18 16:54:57,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741920561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:54:57,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248858200] [2022-01-18 16:54:57,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:54:57,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:54:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:54:57,973 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:54:57,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 16:54:58,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:54:58,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:54:58,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:54:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:54:59,352 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:54:59,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 107 [2022-01-18 16:54:59,445 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-01-18 16:54:59,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:54:59,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:54:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:54:59,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:54:59,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:54:59,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 16:55:00,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 16:55:00,562 INFO L353 Elim1Store]: treesize reduction 104, result has 35.4 percent of original size [2022-01-18 16:55:00,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 172 [2022-01-18 16:55:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:55:01,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248858200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:55:01,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:55:01,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2022-01-18 16:55:01,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681530860] [2022-01-18 16:55:01,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:55:01,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-18 16:55:01,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:55:01,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-18 16:55:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:55:01,273 INFO L87 Difference]: Start difference. First operand 598862 states and 1902522 transitions. Second operand has 54 states, 54 states have (on average 2.814814814814815) internal successors, (152), 53 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:56:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:56:22,122 INFO L93 Difference]: Finished difference Result 1206932 states and 3770738 transitions. [2022-01-18 16:56:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 930 states. [2022-01-18 16:56:22,123 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.814814814814815) internal successors, (152), 53 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 16:56:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:56:29,410 INFO L225 Difference]: With dead ends: 1206932 [2022-01-18 16:56:29,410 INFO L226 Difference]: Without dead ends: 1178105 [2022-01-18 16:56:29,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 960 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441745 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=57402, Invalid=867080, Unknown=0, NotChecked=0, Total=924482 [2022-01-18 16:56:29,448 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 3255 mSDsluCounter, 14976 mSDsCounter, 0 mSdLazyCounter, 23698 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3255 SdHoareTripleChecker+Valid, 11770 SdHoareTripleChecker+Invalid, 24868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 23698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:56:29,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3255 Valid, 11770 Invalid, 24868 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1170 Valid, 23698 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-01-18 16:56:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178105 states. [2022-01-18 16:56:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178105 to 647002. [2022-01-18 16:57:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647002 states, 647001 states have (on average 3.174069282736812) internal successors, (2053626), 647001 states have internal predecessors, (2053626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:57:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647002 states to 647002 states and 2053626 transitions. [2022-01-18 16:57:06,852 INFO L78 Accepts]: Start accepts. Automaton has 647002 states and 2053626 transitions. Word has length 61 [2022-01-18 16:57:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:57:06,852 INFO L470 AbstractCegarLoop]: Abstraction has 647002 states and 2053626 transitions. [2022-01-18 16:57:06,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.814814814814815) internal successors, (152), 53 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:57:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 647002 states and 2053626 transitions. [2022-01-18 16:57:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 16:57:08,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:57:08,823 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:57:08,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 16:57:09,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:57:09,038 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:57:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:57:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1825900602, now seen corresponding path program 30 times [2022-01-18 16:57:09,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:57:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636960051] [2022-01-18 16:57:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:57:09,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:57:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:57:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:57:09,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:57:09,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636960051] [2022-01-18 16:57:09,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636960051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:57:09,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825143486] [2022-01-18 16:57:09,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:57:09,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:57:09,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:57:09,444 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:57:09,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 16:57:09,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:57:09,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:57:09,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:57:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:57:10,499 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:57:10,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 95 [2022-01-18 16:57:10,626 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-01-18 16:57:10,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 23 [2022-01-18 16:57:10,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:57:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:57:10,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:57:10,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:57:10,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-01-18 16:57:11,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-01-18 16:57:11,449 INFO L353 Elim1Store]: treesize reduction 26, result has 57.4 percent of original size [2022-01-18 16:57:11,450 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 113 treesize of output 133 [2022-01-18 16:57:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:57:11,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825143486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:57:11,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:57:11,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 45 [2022-01-18 16:57:11,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880487270] [2022-01-18 16:57:11,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:57:11,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:57:11,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:57:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:57:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:57:11,619 INFO L87 Difference]: Start difference. First operand 647002 states and 2053626 transitions. Second operand has 46 states, 46 states have (on average 2.847826086956522) internal successors, (131), 45 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:57:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:57:57,335 INFO L93 Difference]: Finished difference Result 1481907 states and 4606320 transitions. [2022-01-18 16:57:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 649 states. [2022-01-18 16:57:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.847826086956522) internal successors, (131), 45 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 16:57:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:58:09,270 INFO L225 Difference]: With dead ends: 1481907 [2022-01-18 16:58:09,270 INFO L226 Difference]: Without dead ends: 1481842 [2022-01-18 16:58:09,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226995 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=45638, Invalid=410662, Unknown=0, NotChecked=0, Total=456300 [2022-01-18 16:58:09,285 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 2739 mSDsluCounter, 6578 mSDsCounter, 0 mSdLazyCounter, 8635 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2739 SdHoareTripleChecker+Valid, 5154 SdHoareTripleChecker+Invalid, 9680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 8635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:58:09,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2739 Valid, 5154 Invalid, 9680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 8635 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-18 16:58:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481842 states. Received shutdown request... [2022-01-18 16:58:25,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 16:58:25,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 16:58:25,673 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:58:25,674 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:58:25,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:58:25,862 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-18 16:58:25,864 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 16:58:25,864 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 16:58:25,864 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 16:58:25,867 INFO L732 BasicCegarLoop]: Path program histogram: [30, 1, 1, 1] [2022-01-18 16:58:25,877 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:58:25,878 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:58:25,882 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:58:25 BasicIcfg [2022-01-18 16:58:25,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:58:25,882 INFO L158 Benchmark]: Toolchain (without parser) took 756242.60ms. Allocated memory was 377.5MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 338.4MB in the beginning and 10.9GB in the end (delta: -10.5GB). Peak memory consumption was 8.1GB. Max. memory is 16.0GB. [2022-01-18 16:58:25,882 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 377.5MB. Free memory is still 339.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:58:25,882 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.00ms. Allocated memory is still 377.5MB. Free memory was 338.4MB in the beginning and 336.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:58:25,882 INFO L158 Benchmark]: Boogie Preprocessor took 11.66ms. Allocated memory is still 377.5MB. Free memory was 336.8MB in the beginning and 335.9MB in the end (delta: 944.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:58:25,882 INFO L158 Benchmark]: RCFGBuilder took 283.44ms. Allocated memory is still 377.5MB. Free memory was 335.7MB in the beginning and 324.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 16:58:25,882 INFO L158 Benchmark]: TraceAbstraction took 755926.14ms. Allocated memory was 377.5MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 324.4MB in the beginning and 10.9GB in the end (delta: -10.5GB). Peak memory consumption was 8.1GB. Max. memory is 16.0GB. [2022-01-18 16:58:25,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 377.5MB. Free memory is still 339.7MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.00ms. Allocated memory is still 377.5MB. Free memory was 338.4MB in the beginning and 336.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 11.66ms. Allocated memory is still 377.5MB. Free memory was 336.8MB in the beginning and 335.9MB in the end (delta: 944.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 283.44ms. Allocated memory is still 377.5MB. Free memory was 335.7MB in the beginning and 324.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 755926.14ms. Allocated memory was 377.5MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 324.4MB in the beginning and 10.9GB in the end (delta: -10.5GB). Peak memory consumption was 8.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 755.8s, OverallIterations: 33, TraceHistogramMax: 7, PathProgramHistogramMax: 30, EmptinessCheckTime: 10.9s, AutomataDifference: 493.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51154 SdHoareTripleChecker+Valid, 68.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51154 mSDsluCounter, 75282 SdHoareTripleChecker+Invalid, 57.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 96090 mSDsCounter, 14953 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 140098 IncrementalHoareTripleChecker+Invalid, 155051 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14953 mSolverCounterUnsat, 3640 mSDtfsCounter, 140098 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10661 GetRequests, 2305 SyntacticMatches, 32 SemanticMatches, 8324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024057 ImplicationChecksByTransitivity, 328.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=647002occurred in iteration=32, InterpolantAutomatonStates: 7842, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 162.8s AutomataMinimizationTime, 33 MinimizatonAttempts, 3071864 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 80.1s InterpolantComputationTime, 2933 NumberOfCodeBlocks, 2922 NumberOfCodeBlocksAsserted, 148 NumberOfCheckSat, 4263 ConstructedInterpolants, 0 QuantifiedInterpolants, 64303 SizeOfPredicates, 431 NumberOfNonLiveVariables, 3648 ConjunctsInSsa, 598 ConjunctsInUnsatCore, 91 InterpolantComputations, 4 PerfectInterpolantSequences, 989/3978 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