/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:30:01,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:30:01,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:30:01,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:30:01,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:30:01,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:30:01,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:30:01,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:30:01,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:30:01,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:30:01,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:30:01,288 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:30:01,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:30:01,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:30:01,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:30:01,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:30:01,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:30:01,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:30:01,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:30:01,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:30:01,290 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:30:01,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:30:01,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:30:01,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:30:01,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:30:01,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:30:01,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:30:01,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:30:01,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:30:01,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:30:01,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:30:01,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:30:01,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:30:01,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:30:01,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:30:01,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:30:01,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:30:01,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:30:01,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:30:01,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:30:01,624 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:30:01,625 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:30:01,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2021-08-21 12:30:01,626 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2021-08-21 12:30:01,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:30:01,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:30:01,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:30:01,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:30:01,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:30:01,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:30:01,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:30:01,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:30:01,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:30:01,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:30:01,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:30:01,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:30:01,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:30:01,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/1) ... [2021-08-21 12:30:01,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:30:01,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:01,757 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) [2021-08-21 12:30:01,774 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 [2021-08-21 12:30:01,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:30:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:30:01,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:30:01,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:30:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:30:01,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:30:01,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:30:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:30:01,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:30:01,796 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:30:02,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:30:02,009 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:30:02,010 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:30:02 BoogieIcfgContainer [2021-08-21 12:30:02,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:30:02,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:30:02,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:30:02,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:30:02,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:01" (1/2) ... [2021-08-21 12:30:02,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5c8d7 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:30:02, skipping insertion in model container [2021-08-21 12:30:02,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:30:02" (2/2) ... [2021-08-21 12:30:02,016 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2021-08-21 12:30:02,036 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:30:02,037 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:30:02,037 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:30:02,037 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:30:02,094 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:30:02,145 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:30:02,153 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, mConcurrency=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 [2021-08-21 12:30:02,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:30:02,163 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2021-08-21 12:30:02,189 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:30:02,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:02,201 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:02,202 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:02,207 INFO L82 PathProgramCache]: Analyzing trace with hash -658757211, now seen corresponding path program 1 times [2021-08-21 12:30:02,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:02,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404209378] [2021-08-21 12:30:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:02,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:02,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:02,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404209378] [2021-08-21 12:30:02,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404209378] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:02,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:02,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:30:02,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639678403] [2021-08-21 12:30:02,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:02,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:02,492 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:02,645 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2021-08-21 12:30:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:30:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:02,657 INFO L225 Difference]: With dead ends: 299 [2021-08-21 12:30:02,658 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 12:30:02,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 12:30:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2021-08-21 12:30:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-08-21 12:30:02,701 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2021-08-21 12:30:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:02,701 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-08-21 12:30:02,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-08-21 12:30:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:30:02,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:02,703 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:02,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:30:02,704 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1900646624, now seen corresponding path program 1 times [2021-08-21 12:30:02,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:02,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434239221] [2021-08-21 12:30:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:02,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:02,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:02,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434239221] [2021-08-21 12:30:02,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434239221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:02,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622272593] [2021-08-21 12:30:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:02,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:02,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:02,801 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) [2021-08-21 12:30:02,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:30:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:02,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:30:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:03,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622272593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:03,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:03,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:30:03,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617470630] [2021-08-21 12:30:03,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:03,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:03,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:03,039 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:03,131 INFO L93 Difference]: Finished difference Result 274 states and 579 transitions. [2021-08-21 12:30:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:30:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:30:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:03,134 INFO L225 Difference]: With dead ends: 274 [2021-08-21 12:30:03,134 INFO L226 Difference]: Without dead ends: 274 [2021-08-21 12:30:03,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-08-21 12:30:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 124. [2021-08-21 12:30:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-08-21 12:30:03,148 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2021-08-21 12:30:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:03,148 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-08-21 12:30:03,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-08-21 12:30:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:30:03,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:03,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:03,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:03,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:03,373 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1663020490, now seen corresponding path program 1 times [2021-08-21 12:30:03,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:03,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257517761] [2021-08-21 12:30:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:03,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:03,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:03,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257517761] [2021-08-21 12:30:03,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257517761] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:03,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:03,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:30:03,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302499231] [2021-08-21 12:30:03,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:03,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:03,420 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:03,488 INFO L93 Difference]: Finished difference Result 159 states and 339 transitions. [2021-08-21 12:30:03,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:03,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:30:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:03,490 INFO L225 Difference]: With dead ends: 159 [2021-08-21 12:30:03,490 INFO L226 Difference]: Without dead ends: 149 [2021-08-21 12:30:03,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-21 12:30:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2021-08-21 12:30:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-08-21 12:30:03,501 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2021-08-21 12:30:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:03,501 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-08-21 12:30:03,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-08-21 12:30:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:30:03,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:03,503 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:03,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:30:03,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:03,504 INFO L82 PathProgramCache]: Analyzing trace with hash 585178474, now seen corresponding path program 2 times [2021-08-21 12:30:03,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:03,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621205773] [2021-08-21 12:30:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:03,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:03,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:03,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621205773] [2021-08-21 12:30:03,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621205773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:03,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850731365] [2021-08-21 12:30:03,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:03,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:03,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:03,553 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) [2021-08-21 12:30:03,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:30:03,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:03,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:03,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:30:03,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:03,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850731365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:03,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:03,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:30:03,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011219640] [2021-08-21 12:30:03,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:03,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:03,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:03,681 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:03,788 INFO L93 Difference]: Finished difference Result 205 states and 453 transitions. [2021-08-21 12:30:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:30:03,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:30:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:03,793 INFO L225 Difference]: With dead ends: 205 [2021-08-21 12:30:03,793 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 12:30:03,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 12:30:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 125. [2021-08-21 12:30:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-08-21 12:30:03,812 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2021-08-21 12:30:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:03,813 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-08-21 12:30:03,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-08-21 12:30:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:03,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:03,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:03,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:04,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 12:30:04,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1679753339, now seen corresponding path program 1 times [2021-08-21 12:30:04,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:04,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397538288] [2021-08-21 12:30:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:04,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:04,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:04,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397538288] [2021-08-21 12:30:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397538288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:04,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516093190] [2021-08-21 12:30:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:04,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:04,322 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) [2021-08-21 12:30:04,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:30:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:04,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:30:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:04,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:30:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:04,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516093190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:04,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:04,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:30:04,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986016158] [2021-08-21 12:30:04,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:30:04,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:30:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:04,839 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:05,108 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2021-08-21 12:30:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:30:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:05,111 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:30:05,111 INFO L226 Difference]: Without dead ends: 431 [2021-08-21 12:30:05,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-21 12:30:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2021-08-21 12:30:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-08-21 12:30:05,122 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2021-08-21 12:30:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:05,123 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-08-21 12:30:05,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-08-21 12:30:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:05,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:05,125 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:05,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:05,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:05,345 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1612347543, now seen corresponding path program 2 times [2021-08-21 12:30:05,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:05,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750066429] [2021-08-21 12:30:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:05,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:05,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:05,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750066429] [2021-08-21 12:30:05,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750066429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:05,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382814506] [2021-08-21 12:30:05,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:05,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:05,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:05,548 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) [2021-08-21 12:30:05,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:30:05,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:30:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:05,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:30:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:06,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382814506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:06,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:06,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:30:06,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281028035] [2021-08-21 12:30:06,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:30:06,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:30:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:06,033 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:06,306 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2021-08-21 12:30:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:30:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:06,311 INFO L225 Difference]: With dead ends: 432 [2021-08-21 12:30:06,311 INFO L226 Difference]: Without dead ends: 423 [2021-08-21 12:30:06,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-08-21 12:30:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2021-08-21 12:30:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2021-08-21 12:30:06,326 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2021-08-21 12:30:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:06,327 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2021-08-21 12:30:06,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2021-08-21 12:30:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:06,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:06,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:06,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:06,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:06,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash 144053507, now seen corresponding path program 3 times [2021-08-21 12:30:06,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:06,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178418350] [2021-08-21 12:30:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:06,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:06,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:06,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178418350] [2021-08-21 12:30:06,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178418350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:06,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031552893] [2021-08-21 12:30:06,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:06,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:06,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:06,700 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) [2021-08-21 12:30:06,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:30:06,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:30:06,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:30:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:07,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 11 [2021-08-21 12:30:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:07,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031552893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:07,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:07,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:30:07,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404636248] [2021-08-21 12:30:07,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:30:07,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:30:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:07,187 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:07,396 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2021-08-21 12:30:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:07,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:30:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:07,399 INFO L225 Difference]: With dead ends: 440 [2021-08-21 12:30:07,399 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 12:30:07,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 12:30:07,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2021-08-21 12:30:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2021-08-21 12:30:07,411 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2021-08-21 12:30:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:07,411 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2021-08-21 12:30:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2021-08-21 12:30:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:07,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:07,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:07,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:07,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:07,629 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:07,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2006109563, now seen corresponding path program 4 times [2021-08-21 12:30:07,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:07,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250932873] [2021-08-21 12:30:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:07,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:07,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:07,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250932873] [2021-08-21 12:30:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250932873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:07,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129720042] [2021-08-21 12:30:07,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:07,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:07,799 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) [2021-08-21 12:30:07,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:30:07,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:07,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:30:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:30:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:08,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129720042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:08,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:08,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:30:08,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394505818] [2021-08-21 12:30:08,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:30:08,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:30:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:08,323 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:08,557 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2021-08-21 12:30:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:08,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:30:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:08,561 INFO L225 Difference]: With dead ends: 471 [2021-08-21 12:30:08,561 INFO L226 Difference]: Without dead ends: 462 [2021-08-21 12:30:08,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-21 12:30:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2021-08-21 12:30:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-08-21 12:30:08,569 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-08-21 12:30:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:08,570 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-08-21 12:30:08,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-08-21 12:30:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:08,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:08,571 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:08,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:08,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:08,793 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:08,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1668370597, now seen corresponding path program 5 times [2021-08-21 12:30:08,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:08,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347217937] [2021-08-21 12:30:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:08,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:08,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:08,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347217937] [2021-08-21 12:30:08,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347217937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:08,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838898204] [2021-08-21 12:30:08,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:08,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:08,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:08,953 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) [2021-08-21 12:30:08,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:30:09,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:30:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:30:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:09,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 11 [2021-08-21 12:30:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:09,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838898204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:09,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:09,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:30:09,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337208704] [2021-08-21 12:30:09,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:30:09,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:09,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:30:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:09,536 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:09,776 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2021-08-21 12:30:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:30:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:09,779 INFO L225 Difference]: With dead ends: 472 [2021-08-21 12:30:09,779 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 12:30:09,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 12:30:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2021-08-21 12:30:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2021-08-21 12:30:09,787 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2021-08-21 12:30:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:09,788 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2021-08-21 12:30:09,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2021-08-21 12:30:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:09,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:09,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:09,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-21 12:30:10,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:10,012 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1961393531, now seen corresponding path program 6 times [2021-08-21 12:30:10,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:10,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910045250] [2021-08-21 12:30:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:10,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:10,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:10,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910045250] [2021-08-21 12:30:10,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910045250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:10,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409537084] [2021-08-21 12:30:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:10,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:10,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:10,149 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) [2021-08-21 12:30:10,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:30:10,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:30:10,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:30:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:10,646 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:10,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-08-21 12:30:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:10,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409537084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:10,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:10,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:30:10,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541912202] [2021-08-21 12:30:10,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:30:10,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:30:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:10,756 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:11,027 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2021-08-21 12:30:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:30:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:11,033 INFO L225 Difference]: With dead ends: 469 [2021-08-21 12:30:11,033 INFO L226 Difference]: Without dead ends: 458 [2021-08-21 12:30:11,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:30:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-21 12:30:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2021-08-21 12:30:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-08-21 12:30:11,040 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-08-21 12:30:11,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:11,040 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-08-21 12:30:11,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-08-21 12:30:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:11,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:11,041 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:11,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:11,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 12:30:11,265 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 199031744, now seen corresponding path program 7 times [2021-08-21 12:30:11,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:11,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307050921] [2021-08-21 12:30:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:11,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:11,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:11,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307050921] [2021-08-21 12:30:11,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307050921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:11,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801293794] [2021-08-21 12:30:11,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:11,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:11,307 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) [2021-08-21 12:30:11,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:30:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:11,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801293794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:11,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:30:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583920189] [2021-08-21 12:30:11,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:11,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:11,635 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:11,774 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2021-08-21 12:30:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:11,777 INFO L225 Difference]: With dead ends: 475 [2021-08-21 12:30:11,777 INFO L226 Difference]: Without dead ends: 475 [2021-08-21 12:30:11,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-08-21 12:30:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2021-08-21 12:30:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2021-08-21 12:30:11,786 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2021-08-21 12:30:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:11,786 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2021-08-21 12:30:11,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2021-08-21 12:30:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:11,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:11,787 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:11,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:12,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:12,009 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1171876950, now seen corresponding path program 8 times [2021-08-21 12:30:12,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:12,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634305533] [2021-08-21 12:30:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:12,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:12,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:12,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634305533] [2021-08-21 12:30:12,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634305533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:12,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433897402] [2021-08-21 12:30:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:12,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:12,089 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) [2021-08-21 12:30:12,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:30:12,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:12,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:12,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:12,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433897402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:12,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:12,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:30:12,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731995021] [2021-08-21 12:30:12,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:12,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:12,390 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:12,537 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2021-08-21 12:30:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:12,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:12,540 INFO L225 Difference]: With dead ends: 596 [2021-08-21 12:30:12,540 INFO L226 Difference]: Without dead ends: 565 [2021-08-21 12:30:12,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-21 12:30:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2021-08-21 12:30:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2021-08-21 12:30:12,553 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2021-08-21 12:30:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:12,553 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2021-08-21 12:30:12,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2021-08-21 12:30:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:12,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:12,555 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:12,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:12,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 12:30:12,769 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1565100002, now seen corresponding path program 9 times [2021-08-21 12:30:12,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:12,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748364490] [2021-08-21 12:30:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:12,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:12,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:12,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748364490] [2021-08-21 12:30:12,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748364490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:12,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788429982] [2021-08-21 12:30:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:12,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:12,826 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) [2021-08-21 12:30:12,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:30:13,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:30:13,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:13,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:13,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788429982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:13,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:13,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:30:13,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654175369] [2021-08-21 12:30:13,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:13,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:13,164 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:13,292 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2021-08-21 12:30:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:13,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:13,295 INFO L225 Difference]: With dead ends: 552 [2021-08-21 12:30:13,296 INFO L226 Difference]: Without dead ends: 552 [2021-08-21 12:30:13,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-21 12:30:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2021-08-21 12:30:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2021-08-21 12:30:13,309 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2021-08-21 12:30:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:13,309 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2021-08-21 12:30:13,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2021-08-21 12:30:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:13,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:13,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:13,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:13,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:30:13,525 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2066967746, now seen corresponding path program 10 times [2021-08-21 12:30:13,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:13,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220825784] [2021-08-21 12:30:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:13,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:13,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:13,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220825784] [2021-08-21 12:30:13,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220825784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:13,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651640765] [2021-08-21 12:30:13,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:13,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:13,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:13,571 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) [2021-08-21 12:30:13,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:30:13,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:13,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:13,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:13,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:13,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651640765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:13,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:13,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:30:13,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357912106] [2021-08-21 12:30:13,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:13,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:13,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:13,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:13,914 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:14,031 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2021-08-21 12:30:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:30:14,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:14,034 INFO L225 Difference]: With dead ends: 568 [2021-08-21 12:30:14,034 INFO L226 Difference]: Without dead ends: 565 [2021-08-21 12:30:14,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:30:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-21 12:30:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2021-08-21 12:30:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2021-08-21 12:30:14,045 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2021-08-21 12:30:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:14,046 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2021-08-21 12:30:14,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2021-08-21 12:30:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:14,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:14,047 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:14,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-21 12:30:14,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:30:14,261 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 459469306, now seen corresponding path program 11 times [2021-08-21 12:30:14,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:14,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763124995] [2021-08-21 12:30:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:14,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:14,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:14,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763124995] [2021-08-21 12:30:14,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763124995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:14,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422422343] [2021-08-21 12:30:14,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:14,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:14,303 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) [2021-08-21 12:30:14,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:30:14,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:30:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:14,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422422343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:14,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:14,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:30:14,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736454059] [2021-08-21 12:30:14,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:14,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:14,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:14,657 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:14,763 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2021-08-21 12:30:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:14,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:14,766 INFO L225 Difference]: With dead ends: 699 [2021-08-21 12:30:14,766 INFO L226 Difference]: Without dead ends: 699 [2021-08-21 12:30:14,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-08-21 12:30:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2021-08-21 12:30:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2021-08-21 12:30:14,782 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2021-08-21 12:30:14,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:14,783 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2021-08-21 12:30:14,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:14,783 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2021-08-21 12:30:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:14,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:14,785 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:14,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:15,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:30:15,009 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash 961337050, now seen corresponding path program 12 times [2021-08-21 12:30:15,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:15,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594862483] [2021-08-21 12:30:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:15,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:15,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:15,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594862483] [2021-08-21 12:30:15,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594862483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:15,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220586756] [2021-08-21 12:30:15,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:15,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:15,058 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) [2021-08-21 12:30:15,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:30:15,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:30:15,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:15,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220586756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:15,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:15,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:30:15,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987830959] [2021-08-21 12:30:15,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:15,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:15,391 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:15,510 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2021-08-21 12:30:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:30:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:15,513 INFO L225 Difference]: With dead ends: 875 [2021-08-21 12:30:15,513 INFO L226 Difference]: Without dead ends: 872 [2021-08-21 12:30:15,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:30:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-08-21 12:30:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2021-08-21 12:30:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2021-08-21 12:30:15,530 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2021-08-21 12:30:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:15,531 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2021-08-21 12:30:15,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2021-08-21 12:30:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:15,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:15,532 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:15,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:15,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:15,755 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash 619914420, now seen corresponding path program 13 times [2021-08-21 12:30:15,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:15,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80882889] [2021-08-21 12:30:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:15,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:15,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:15,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80882889] [2021-08-21 12:30:15,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80882889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:15,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036570238] [2021-08-21 12:30:15,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:15,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:15,793 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) [2021-08-21 12:30:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:30:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:16,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:16,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036570238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:16,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:16,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:30:16,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865021110] [2021-08-21 12:30:16,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:16,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:16,204 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:16,305 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2021-08-21 12:30:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:16,309 INFO L225 Difference]: With dead ends: 880 [2021-08-21 12:30:16,309 INFO L226 Difference]: Without dead ends: 880 [2021-08-21 12:30:16,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-08-21 12:30:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2021-08-21 12:30:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2021-08-21 12:30:16,327 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2021-08-21 12:30:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:16,327 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2021-08-21 12:30:16,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2021-08-21 12:30:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:16,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:16,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:16,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:16,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:30:16,545 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:16,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1526572242, now seen corresponding path program 14 times [2021-08-21 12:30:16,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:16,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920025327] [2021-08-21 12:30:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:16,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:16,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:16,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920025327] [2021-08-21 12:30:16,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920025327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:16,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059751788] [2021-08-21 12:30:16,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:16,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:16,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:16,597 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) [2021-08-21 12:30:16,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:30:16,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:16,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:16,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:16,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059751788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:16,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:16,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:30:16,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997494074] [2021-08-21 12:30:16,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:16,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:16,964 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:17,111 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2021-08-21 12:30:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:30:17,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:17,115 INFO L225 Difference]: With dead ends: 810 [2021-08-21 12:30:17,115 INFO L226 Difference]: Without dead ends: 806 [2021-08-21 12:30:17,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:30:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-08-21 12:30:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2021-08-21 12:30:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2021-08-21 12:30:17,130 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2021-08-21 12:30:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:17,130 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2021-08-21 12:30:17,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2021-08-21 12:30:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:17,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:17,132 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:17,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:17,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:30:17,355 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash 190722878, now seen corresponding path program 15 times [2021-08-21 12:30:17,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:17,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417230625] [2021-08-21 12:30:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:17,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:17,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:17,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417230625] [2021-08-21 12:30:17,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417230625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:17,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550648680] [2021-08-21 12:30:17,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:17,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:17,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:17,394 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) [2021-08-21 12:30:17,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:30:17,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:30:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550648680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:17,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:17,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:30:17,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241449584] [2021-08-21 12:30:17,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:17,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:17,766 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:17,904 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2021-08-21 12:30:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:17,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:17,907 INFO L225 Difference]: With dead ends: 795 [2021-08-21 12:30:17,907 INFO L226 Difference]: Without dead ends: 795 [2021-08-21 12:30:17,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-08-21 12:30:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2021-08-21 12:30:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2021-08-21 12:30:17,921 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2021-08-21 12:30:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:17,921 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2021-08-21 12:30:17,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2021-08-21 12:30:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:30:17,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:17,923 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:17,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 12:30:18,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:18,137 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1589266240, now seen corresponding path program 16 times [2021-08-21 12:30:18,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:18,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982520652] [2021-08-21 12:30:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:18,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:18,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982520652] [2021-08-21 12:30:18,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982520652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:18,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153807668] [2021-08-21 12:30:18,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:18,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:18,185 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) [2021-08-21 12:30:18,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:30:18,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:18,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:18,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153807668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:18,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:18,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:30:18,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062330979] [2021-08-21 12:30:18,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:18,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:18,567 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:18,706 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2021-08-21 12:30:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:18,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:30:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:18,711 INFO L225 Difference]: With dead ends: 856 [2021-08-21 12:30:18,712 INFO L226 Difference]: Without dead ends: 835 [2021-08-21 12:30:18,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-08-21 12:30:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2021-08-21 12:30:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2021-08-21 12:30:18,725 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2021-08-21 12:30:18,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:18,725 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2021-08-21 12:30:18,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2021-08-21 12:30:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:18,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:18,727 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:18,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:18,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:18,945 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1761346971, now seen corresponding path program 17 times [2021-08-21 12:30:18,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:18,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376945360] [2021-08-21 12:30:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:18,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:19,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:19,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376945360] [2021-08-21 12:30:19,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376945360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:19,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126120120] [2021-08-21 12:30:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:19,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:19,468 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) [2021-08-21 12:30:19,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:30:19,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:30:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:19,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:20,340 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:20,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126120120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:20,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:20,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-08-21 12:30:20,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316508007] [2021-08-21 12:30:20,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:30:20,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:30:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:30:20,423 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:21,271 INFO L93 Difference]: Finished difference Result 1938 states and 4685 transitions. [2021-08-21 12:30:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:30:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:21,278 INFO L225 Difference]: With dead ends: 1938 [2021-08-21 12:30:21,278 INFO L226 Difference]: Without dead ends: 1928 [2021-08-21 12:30:21,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:30:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-21 12:30:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 773. [2021-08-21 12:30:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2021-08-21 12:30:21,297 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2021-08-21 12:30:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:21,297 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2021-08-21 12:30:21,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2021-08-21 12:30:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:21,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:21,299 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:21,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:21,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:21,513 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1956939167, now seen corresponding path program 18 times [2021-08-21 12:30:21,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:21,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411244057] [2021-08-21 12:30:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:21,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:22,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:22,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411244057] [2021-08-21 12:30:22,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411244057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:22,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194640377] [2021-08-21 12:30:22,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:22,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:22,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:22,064 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) [2021-08-21 12:30:22,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:30:22,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:30:22,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:22,960 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:23,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194640377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:23,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-08-21 12:30:23,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85164979] [2021-08-21 12:30:23,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:23,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:23,065 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:24,289 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2021-08-21 12:30:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:30:24,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:24,299 INFO L225 Difference]: With dead ends: 2173 [2021-08-21 12:30:24,299 INFO L226 Difference]: Without dead ends: 2162 [2021-08-21 12:30:24,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 863.9ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:30:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-08-21 12:30:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2021-08-21 12:30:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2021-08-21 12:30:24,323 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2021-08-21 12:30:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:24,323 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2021-08-21 12:30:24,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2021-08-21 12:30:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:24,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:24,326 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:24,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:24,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 12:30:24,549 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash -581627079, now seen corresponding path program 19 times [2021-08-21 12:30:24,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:24,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148343423] [2021-08-21 12:30:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:24,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:25,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:25,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148343423] [2021-08-21 12:30:25,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148343423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:25,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755164408] [2021-08-21 12:30:25,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:25,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:25,013 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) [2021-08-21 12:30:25,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:30:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:25,902 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:26,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755164408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:26,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:26,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-08-21 12:30:26,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650330205] [2021-08-21 12:30:26,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:26,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:26,015 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:27,127 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2021-08-21 12:30:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:30:27,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,135 INFO L225 Difference]: With dead ends: 2310 [2021-08-21 12:30:27,135 INFO L226 Difference]: Without dead ends: 2290 [2021-08-21 12:30:27,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:30:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-08-21 12:30:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2021-08-21 12:30:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2021-08-21 12:30:27,156 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2021-08-21 12:30:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:27,156 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2021-08-21 12:30:27,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2021-08-21 12:30:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:27,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:27,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:30:27,381 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2142000305, now seen corresponding path program 20 times [2021-08-21 12:30:27,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254273371] [2021-08-21 12:30:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254273371] [2021-08-21 12:30:27,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254273371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:27,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002807811] [2021-08-21 12:30:27,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:27,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:27,848 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) [2021-08-21 12:30:27,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:30:28,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:28,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:28,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:28,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:28,816 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:28,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002807811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:28,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:28,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-08-21 12:30:28,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063250583] [2021-08-21 12:30:28,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:30:28,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:30:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:30:28,890 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:29,882 INFO L93 Difference]: Finished difference Result 2101 states and 5071 transitions. [2021-08-21 12:30:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:30:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:29,890 INFO L225 Difference]: With dead ends: 2101 [2021-08-21 12:30:29,890 INFO L226 Difference]: Without dead ends: 2078 [2021-08-21 12:30:29,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:30:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-08-21 12:30:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 800. [2021-08-21 12:30:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-08-21 12:30:29,913 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-08-21 12:30:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:29,913 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-08-21 12:30:29,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-08-21 12:30:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:29,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:29,915 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:29,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:30,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:30,129 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 828755281, now seen corresponding path program 21 times [2021-08-21 12:30:30,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:30,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922047008] [2021-08-21 12:30:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:30,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:30,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:30,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922047008] [2021-08-21 12:30:30,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922047008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:30,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112168264] [2021-08-21 12:30:30,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:30,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:30,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:30,564 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) [2021-08-21 12:30:30,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:30:31,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:30:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:31,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:30:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:31,898 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 12:30:31,899 INFO L388 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 30 [2021-08-21 12:30:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:31,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112168264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:31,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:31,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-21 12:30:31,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224971049] [2021-08-21 12:30:31,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:30:31,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:31,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:30:31,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:30:31,985 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:33,307 INFO L93 Difference]: Finished difference Result 1859 states and 4469 transitions. [2021-08-21 12:30:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:30:33,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:33,314 INFO L225 Difference]: With dead ends: 1859 [2021-08-21 12:30:33,314 INFO L226 Difference]: Without dead ends: 1849 [2021-08-21 12:30:33,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1021.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:30:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-08-21 12:30:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 800. [2021-08-21 12:30:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-08-21 12:30:33,333 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-08-21 12:30:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:33,333 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-08-21 12:30:33,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-08-21 12:30:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:33,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:33,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:33,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:33,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:33,557 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:33,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1822474267, now seen corresponding path program 22 times [2021-08-21 12:30:33,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:33,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73909050] [2021-08-21 12:30:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:33,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:33,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:33,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73909050] [2021-08-21 12:30:33,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73909050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:33,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478409244] [2021-08-21 12:30:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:33,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:33,966 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) [2021-08-21 12:30:33,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:30:34,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:35,083 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:35,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478409244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:35,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:35,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-08-21 12:30:35,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807200223] [2021-08-21 12:30:35,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:35,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:35,164 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:36,701 INFO L93 Difference]: Finished difference Result 2092 states and 5123 transitions. [2021-08-21 12:30:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:30:36,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:36,707 INFO L225 Difference]: With dead ends: 2092 [2021-08-21 12:30:36,707 INFO L226 Difference]: Without dead ends: 2083 [2021-08-21 12:30:36,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:30:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-08-21 12:30:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 825. [2021-08-21 12:30:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.371359223300971) internal successors, (1954), 824 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1954 transitions. [2021-08-21 12:30:36,725 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1954 transitions. Word has length 29 [2021-08-21 12:30:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:36,725 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1954 transitions. [2021-08-21 12:30:36,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1954 transitions. [2021-08-21 12:30:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:36,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:36,730 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:36,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:36,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:30:36,954 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:36,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:36,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1852005893, now seen corresponding path program 23 times [2021-08-21 12:30:36,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:36,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880910569] [2021-08-21 12:30:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:36,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:37,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:37,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880910569] [2021-08-21 12:30:37,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880910569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:37,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158600057] [2021-08-21 12:30:37,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:37,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:37,375 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) [2021-08-21 12:30:37,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:30:38,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:30:38,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:38,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:38,525 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:38,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158600057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:38,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:38,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-08-21 12:30:38,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157598370] [2021-08-21 12:30:38,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:30:38,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:30:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:30:38,615 INFO L87 Difference]: Start difference. First operand 825 states and 1954 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:39,712 INFO L93 Difference]: Finished difference Result 2113 states and 5192 transitions. [2021-08-21 12:30:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:30:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:39,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:39,716 INFO L225 Difference]: With dead ends: 2113 [2021-08-21 12:30:39,716 INFO L226 Difference]: Without dead ends: 2102 [2021-08-21 12:30:39,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 840.9ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:30:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-08-21 12:30:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 837. [2021-08-21 12:30:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.373205741626794) internal successors, (1984), 836 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1984 transitions. [2021-08-21 12:30:39,733 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1984 transitions. Word has length 29 [2021-08-21 12:30:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:39,733 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1984 transitions. [2021-08-21 12:30:39,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1984 transitions. [2021-08-21 12:30:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:39,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:39,735 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:39,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:39,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:30:39,960 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1777758235, now seen corresponding path program 24 times [2021-08-21 12:30:39,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:39,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136594201] [2021-08-21 12:30:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:39,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:40,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:40,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136594201] [2021-08-21 12:30:40,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136594201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:40,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814583212] [2021-08-21 12:30:40,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:40,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:40,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:40,379 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) [2021-08-21 12:30:40,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:30:41,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:30:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:41,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:30:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:41,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:30:41,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-08-21 12:30:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:41,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814583212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:41,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:41,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-21 12:30:41,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293847689] [2021-08-21 12:30:41,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:30:41,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:41,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:30:41,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:30:41,994 INFO L87 Difference]: Start difference. First operand 837 states and 1984 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:44,546 INFO L93 Difference]: Finished difference Result 2331 states and 5739 transitions. [2021-08-21 12:30:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:30:44,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:44,550 INFO L225 Difference]: With dead ends: 2331 [2021-08-21 12:30:44,550 INFO L226 Difference]: Without dead ends: 2310 [2021-08-21 12:30:44,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1750.8ms TimeCoverageRelationStatistics Valid=355, Invalid=2095, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:30:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-08-21 12:30:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 824. [2021-08-21 12:30:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-08-21 12:30:44,569 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-08-21 12:30:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:44,569 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-08-21 12:30:44,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-08-21 12:30:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:44,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:44,579 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:44,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 12:30:44,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:30:44,801 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 709848259, now seen corresponding path program 25 times [2021-08-21 12:30:44,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:44,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031690561] [2021-08-21 12:30:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:44,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:45,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:45,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031690561] [2021-08-21 12:30:45,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031690561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:45,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625835075] [2021-08-21 12:30:45,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:45,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:45,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:45,225 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) [2021-08-21 12:30:45,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:30:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:46,511 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:46,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625835075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:46,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:46,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-08-21 12:30:46,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605144844] [2021-08-21 12:30:46,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:46,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:46,626 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:47,767 INFO L93 Difference]: Finished difference Result 2128 states and 5217 transitions. [2021-08-21 12:30:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:30:47,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:47,772 INFO L225 Difference]: With dead ends: 2128 [2021-08-21 12:30:47,772 INFO L226 Difference]: Without dead ends: 2117 [2021-08-21 12:30:47,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:30:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-08-21 12:30:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 845. [2021-08-21 12:30:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.376777251184834) internal successors, (2006), 844 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2006 transitions. [2021-08-21 12:30:47,808 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2006 transitions. Word has length 29 [2021-08-21 12:30:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2006 transitions. [2021-08-21 12:30:47,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2006 transitions. [2021-08-21 12:30:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:47,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:47,810 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:47,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:48,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:30:48,025 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:48,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1828717987, now seen corresponding path program 26 times [2021-08-21 12:30:48,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:48,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539306754] [2021-08-21 12:30:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:48,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:48,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:48,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539306754] [2021-08-21 12:30:48,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539306754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:48,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779972569] [2021-08-21 12:30:48,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:48,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:48,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:48,505 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) [2021-08-21 12:30:48,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:30:49,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:49,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:49,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:30:49,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:49,850 INFO L388 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 28 treesize of output 16 [2021-08-21 12:30:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:49,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779972569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:49,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:49,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-08-21 12:30:49,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145971711] [2021-08-21 12:30:49,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:49,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:49,983 INFO L87 Difference]: Start difference. First operand 845 states and 2006 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:51,408 INFO L93 Difference]: Finished difference Result 2243 states and 5486 transitions. [2021-08-21 12:30:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:30:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:51,413 INFO L225 Difference]: With dead ends: 2243 [2021-08-21 12:30:51,413 INFO L226 Difference]: Without dead ends: 2223 [2021-08-21 12:30:51,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1168.1ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:30:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-08-21 12:30:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 833. [2021-08-21 12:30:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.373798076923077) internal successors, (1975), 832 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1975 transitions. [2021-08-21 12:30:51,436 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1975 transitions. Word has length 29 [2021-08-21 12:30:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:51,437 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1975 transitions. [2021-08-21 12:30:51,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1975 transitions. [2021-08-21 12:30:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:51,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:51,438 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:51,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:51,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:51,657 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -299763919, now seen corresponding path program 27 times [2021-08-21 12:30:51,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:51,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264374208] [2021-08-21 12:30:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:51,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:52,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:52,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264374208] [2021-08-21 12:30:52,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264374208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:52,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46873517] [2021-08-21 12:30:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:52,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:52,073 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) [2021-08-21 12:30:52,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:30:52,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:30:52,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:52,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:30:52,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:53,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:30:53,672 INFO L388 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 27 treesize of output 43 [2021-08-21 12:30:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:54,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46873517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:54,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:54,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 12:30:54,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386140714] [2021-08-21 12:30:54,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:30:54,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:30:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:30:54,418 INFO L87 Difference]: Start difference. First operand 833 states and 1975 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:58,053 INFO L93 Difference]: Finished difference Result 2108 states and 5089 transitions. [2021-08-21 12:30:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:30:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:30:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:58,058 INFO L225 Difference]: With dead ends: 2108 [2021-08-21 12:30:58,058 INFO L226 Difference]: Without dead ends: 2088 [2021-08-21 12:30:58,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 3109.2ms TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 12:30:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-08-21 12:30:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 841. [2021-08-21 12:30:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.3773809523809524) internal successors, (1997), 840 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1997 transitions. [2021-08-21 12:30:58,078 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1997 transitions. Word has length 29 [2021-08-21 12:30:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:58,078 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1997 transitions. [2021-08-21 12:30:58,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1997 transitions. [2021-08-21 12:30:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:30:58,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:58,080 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:58,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:58,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:58,305 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:58,305 INFO L82 PathProgramCache]: Analyzing trace with hash -724305229, now seen corresponding path program 28 times [2021-08-21 12:30:58,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:58,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105113013] [2021-08-21 12:30:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:58,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:58,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:58,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105113013] [2021-08-21 12:30:58,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105113013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:58,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534714755] [2021-08-21 12:30:58,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:58,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:58,731 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:30:58,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:30:59,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:59,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:59,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:30:59,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:00,157 INFO L388 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 28 treesize of output 16 [2021-08-21 12:31:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:00,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534714755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:00,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:00,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-08-21 12:31:00,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159063131] [2021-08-21 12:31:00,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:00,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:00,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:00,248 INFO L87 Difference]: Start difference. First operand 841 states and 1997 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:01,204 INFO L93 Difference]: Finished difference Result 2251 states and 5527 transitions. [2021-08-21 12:31:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:31:01,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:01,209 INFO L225 Difference]: With dead ends: 2251 [2021-08-21 12:31:01,209 INFO L226 Difference]: Without dead ends: 2240 [2021-08-21 12:31:01,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:31:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-08-21 12:31:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 875. [2021-08-21 12:31:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3878718535469106) internal successors, (2087), 874 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2087 transitions. [2021-08-21 12:31:01,232 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2087 transitions. Word has length 29 [2021-08-21 12:31:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:01,232 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 2087 transitions. [2021-08-21 12:31:01,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2087 transitions. [2021-08-21 12:31:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:01,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:01,234 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:01,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:01,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 12:31:01,457 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1032095821, now seen corresponding path program 29 times [2021-08-21 12:31:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:01,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055038008] [2021-08-21 12:31:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:01,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:01,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:01,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055038008] [2021-08-21 12:31:01,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055038008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:01,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516202407] [2021-08-21 12:31:01,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:01,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:01,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:01,883 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:01,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:31:02,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:31:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:02,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:03,424 INFO L388 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 28 treesize of output 16 [2021-08-21 12:31:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:03,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516202407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:03,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:03,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-08-21 12:31:03,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822797382] [2021-08-21 12:31:03,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:03,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:03,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:03,528 INFO L87 Difference]: Start difference. First operand 875 states and 2087 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:04,670 INFO L93 Difference]: Finished difference Result 2348 states and 5739 transitions. [2021-08-21 12:31:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:31:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:04,675 INFO L225 Difference]: With dead ends: 2348 [2021-08-21 12:31:04,675 INFO L226 Difference]: Without dead ends: 2328 [2021-08-21 12:31:04,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 848.0ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:31:04,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-21 12:31:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 850. [2021-08-21 12:31:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-08-21 12:31:04,700 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-08-21 12:31:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:04,700 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-08-21 12:31:04,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-08-21 12:31:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:04,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:04,702 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:04,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 12:31:04,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:04,917 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -539244091, now seen corresponding path program 30 times [2021-08-21 12:31:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:04,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719840826] [2021-08-21 12:31:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:04,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:05,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:05,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719840826] [2021-08-21 12:31:05,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719840826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:05,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421187943] [2021-08-21 12:31:05,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:05,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:05,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:05,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:31:06,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:31:06,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:06,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:31:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:07,030 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 12:31:07,030 INFO L388 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 36 treesize of output 40 [2021-08-21 12:31:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:07,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421187943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:07,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:07,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-08-21 12:31:07,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265814770] [2021-08-21 12:31:07,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:31:07,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:31:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:31:07,369 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:08,876 INFO L93 Difference]: Finished difference Result 2256 states and 5439 transitions. [2021-08-21 12:31:08,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:31:08,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:08,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:08,879 INFO L225 Difference]: With dead ends: 2256 [2021-08-21 12:31:08,879 INFO L226 Difference]: Without dead ends: 2236 [2021-08-21 12:31:08,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1246.8ms TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:31:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-08-21 12:31:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 853. [2021-08-21 12:31:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.380281690140845) internal successors, (2028), 852 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2028 transitions. [2021-08-21 12:31:08,895 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2028 transitions. Word has length 29 [2021-08-21 12:31:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:08,895 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2028 transitions. [2021-08-21 12:31:08,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2028 transitions. [2021-08-21 12:31:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:08,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:08,897 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:08,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:09,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:09,111 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1852489115, now seen corresponding path program 31 times [2021-08-21 12:31:09,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:09,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238745256] [2021-08-21 12:31:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:09,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:09,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:09,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238745256] [2021-08-21 12:31:09,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238745256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:09,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445595651] [2021-08-21 12:31:09,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:09,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:09,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:09,517 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:09,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:31:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:10,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:10,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:11,177 INFO L388 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 28 treesize of output 16 [2021-08-21 12:31:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:11,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445595651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:11,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:11,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-08-21 12:31:11,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184992935] [2021-08-21 12:31:11,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:31:11,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:31:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:31:11,254 INFO L87 Difference]: Start difference. First operand 853 states and 2028 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:12,184 INFO L93 Difference]: Finished difference Result 2014 states and 4879 transitions. [2021-08-21 12:31:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:31:12,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:12,187 INFO L225 Difference]: With dead ends: 2014 [2021-08-21 12:31:12,187 INFO L226 Difference]: Without dead ends: 2004 [2021-08-21 12:31:12,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:31:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-08-21 12:31:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 850. [2021-08-21 12:31:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-08-21 12:31:12,202 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-08-21 12:31:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-08-21 12:31:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-08-21 12:31:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:12,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:12,204 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:12,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:12,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 12:31:12,417 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash 760670925, now seen corresponding path program 32 times [2021-08-21 12:31:12,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:12,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652777913] [2021-08-21 12:31:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:12,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:12,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:12,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652777913] [2021-08-21 12:31:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652777913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:12,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585763043] [2021-08-21 12:31:12,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:12,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:12,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:12,801 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:12,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:31:14,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:14,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:31:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:14,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:31:14,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:31:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-08-21 12:31:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:14,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585763043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:14,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:14,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-21 12:31:14,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314998608] [2021-08-21 12:31:14,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:31:14,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:31:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:31:14,818 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:17,295 INFO L93 Difference]: Finished difference Result 2447 states and 5922 transitions. [2021-08-21 12:31:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 12:31:17,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:17,300 INFO L225 Difference]: With dead ends: 2447 [2021-08-21 12:31:17,300 INFO L226 Difference]: Without dead ends: 2411 [2021-08-21 12:31:17,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2059.5ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:31:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-08-21 12:31:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 863. [2021-08-21 12:31:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.3816705336426915) internal successors, (2053), 862 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2053 transitions. [2021-08-21 12:31:17,317 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2053 transitions. Word has length 29 [2021-08-21 12:31:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:17,317 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2053 transitions. [2021-08-21 12:31:17,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2053 transitions. [2021-08-21 12:31:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:17,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:17,319 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:17,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:17,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:31:17,533 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash 447739461, now seen corresponding path program 33 times [2021-08-21 12:31:17,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:17,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531720740] [2021-08-21 12:31:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:17,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:17,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:17,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531720740] [2021-08-21 12:31:17,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531720740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:17,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000918665] [2021-08-21 12:31:17,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:31:17,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:17,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:17,899 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:17,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:31:19,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:31:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:19,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:19,731 INFO L388 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 19 treesize of output 11 [2021-08-21 12:31:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:19,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000918665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:19,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:19,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:31:19,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412228568] [2021-08-21 12:31:19,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:31:19,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:31:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:31:19,814 INFO L87 Difference]: Start difference. First operand 863 states and 2053 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:21,257 INFO L93 Difference]: Finished difference Result 2377 states and 5723 transitions. [2021-08-21 12:31:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:31:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:21,261 INFO L225 Difference]: With dead ends: 2377 [2021-08-21 12:31:21,261 INFO L226 Difference]: Without dead ends: 2342 [2021-08-21 12:31:21,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1072.5ms TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:31:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-08-21 12:31:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 852. [2021-08-21 12:31:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.3795534665099884) internal successors, (2025), 851 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2025 transitions. [2021-08-21 12:31:21,278 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2025 transitions. Word has length 29 [2021-08-21 12:31:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:21,278 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2025 transitions. [2021-08-21 12:31:21,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2025 transitions. [2021-08-21 12:31:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:21,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:21,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:21,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:21,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:31:21,503 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:21,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:21,503 INFO L82 PathProgramCache]: Analyzing trace with hash -449953889, now seen corresponding path program 34 times [2021-08-21 12:31:21,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:21,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499010422] [2021-08-21 12:31:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:21,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:21,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:21,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499010422] [2021-08-21 12:31:21,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499010422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:21,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828600516] [2021-08-21 12:31:21,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:31:21,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:21,914 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:21,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:31:23,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:31:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:23,763 INFO L388 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 19 treesize of output 11 [2021-08-21 12:31:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:23,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828600516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:23,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:23,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:31:23,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93126771] [2021-08-21 12:31:23,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:31:23,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:31:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:31:23,835 INFO L87 Difference]: Start difference. First operand 852 states and 2025 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:25,038 INFO L93 Difference]: Finished difference Result 2172 states and 5336 transitions. [2021-08-21 12:31:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:31:25,039 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:25,042 INFO L225 Difference]: With dead ends: 2172 [2021-08-21 12:31:25,042 INFO L226 Difference]: Without dead ends: 2163 [2021-08-21 12:31:25,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 828.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:31:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-08-21 12:31:25,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 870. [2021-08-21 12:31:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 2.3855005753739933) internal successors, (2073), 869 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2073 transitions. [2021-08-21 12:31:25,057 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2073 transitions. Word has length 29 [2021-08-21 12:31:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:25,057 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2073 transitions. [2021-08-21 12:31:25,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2073 transitions. [2021-08-21 12:31:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:25,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:25,058 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:25,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 12:31:25,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:25,259 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash -176282151, now seen corresponding path program 35 times [2021-08-21 12:31:25,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:25,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090166986] [2021-08-21 12:31:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:25,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:25,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:25,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090166986] [2021-08-21 12:31:25,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090166986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:25,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012078273] [2021-08-21 12:31:25,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:25,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:25,611 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:25,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:31:26,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:31:26,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:26,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:31:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:27,440 INFO L388 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 19 treesize of output 11 [2021-08-21 12:31:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:27,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012078273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:27,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:27,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-08-21 12:31:27,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374424142] [2021-08-21 12:31:27,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:27,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:27,529 INFO L87 Difference]: Start difference. First operand 870 states and 2073 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-21 12:31:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:28,467 INFO L93 Difference]: Finished difference Result 2189 states and 5397 transitions. [2021-08-21 12:31:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:31:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 29 [2021-08-21 12:31:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:28,470 INFO L225 Difference]: With dead ends: 2189 [2021-08-21 12:31:28,470 INFO L226 Difference]: Without dead ends: 2178 [2021-08-21 12:31:28,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 699.6ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:31:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-08-21 12:31:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 882. [2021-08-21 12:31:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.3870601589103293) internal successors, (2103), 881 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2103 transitions. [2021-08-21 12:31:28,484 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2103 transitions. Word has length 29 [2021-08-21 12:31:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:28,484 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2103 transitions. [2021-08-21 12:31:28,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-21 12:31:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2103 transitions. [2021-08-21 12:31:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:28,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:28,486 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:28,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:28,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:31:28,705 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash 488921017, now seen corresponding path program 36 times [2021-08-21 12:31:28,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:28,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407017503] [2021-08-21 12:31:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:28,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:29,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:29,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407017503] [2021-08-21 12:31:29,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407017503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:29,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365913984] [2021-08-21 12:31:29,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:29,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:29,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:29,072 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:29,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:31:30,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:31:30,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:31:30,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:31:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:31,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365913984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:31,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:31,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:31:31,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631051259] [2021-08-21 12:31:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:31:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:31:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:31:31,056 INFO L87 Difference]: Start difference. First operand 882 states and 2103 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:31:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:32,260 INFO L93 Difference]: Finished difference Result 2303 states and 5672 transitions. [2021-08-21 12:31:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:31:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:31:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:32,264 INFO L225 Difference]: With dead ends: 2303 [2021-08-21 12:31:32,264 INFO L226 Difference]: Without dead ends: 2283 [2021-08-21 12:31:32,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 949.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:31:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-08-21 12:31:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 893. [2021-08-21 12:31:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.3890134529147984) internal successors, (2131), 892 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2131 transitions. [2021-08-21 12:31:32,278 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2131 transitions. Word has length 29 [2021-08-21 12:31:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:32,278 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2131 transitions. [2021-08-21 12:31:32,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:31:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2131 transitions. [2021-08-21 12:31:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:32,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:32,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:32,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 12:31:32,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:31:32,480 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1182822475, now seen corresponding path program 37 times [2021-08-21 12:31:32,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:32,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632226327] [2021-08-21 12:31:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:32,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:32,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:32,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632226327] [2021-08-21 12:31:32,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632226327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:32,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074283369] [2021-08-21 12:31:32,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:32,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:32,915 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:32,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:31:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:34,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:34,896 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-21 12:31:34,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-08-21 12:31:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:35,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074283369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:35,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:35,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-08-21 12:31:35,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403740043] [2021-08-21 12:31:35,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:31:35,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:31:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:31:35,023 INFO L87 Difference]: Start difference. First operand 893 states and 2131 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:36,080 INFO L93 Difference]: Finished difference Result 2223 states and 5469 transitions. [2021-08-21 12:31:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:31:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:36,084 INFO L225 Difference]: With dead ends: 2223 [2021-08-21 12:31:36,084 INFO L226 Difference]: Without dead ends: 2208 [2021-08-21 12:31:36,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 869.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:31:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-08-21 12:31:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 904. [2021-08-21 12:31:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.389811738648948) internal successors, (2158), 903 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2158 transitions. [2021-08-21 12:31:36,099 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2158 transitions. Word has length 29 [2021-08-21 12:31:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:36,099 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2158 transitions. [2021-08-21 12:31:36,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2158 transitions. [2021-08-21 12:31:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:36,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:36,101 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:36,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 12:31:36,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:36,302 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1355743771, now seen corresponding path program 38 times [2021-08-21 12:31:36,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:36,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732707334] [2021-08-21 12:31:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:36,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:36,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:36,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732707334] [2021-08-21 12:31:36,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732707334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:36,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915524109] [2021-08-21 12:31:36,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:36,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:36,718 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:36,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:31:38,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:38,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:31:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:38,701 INFO L388 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 19 treesize of output 11 [2021-08-21 12:31:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:38,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915524109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:38,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:38,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:31:38,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934534088] [2021-08-21 12:31:38,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:31:38,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:31:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:31:38,831 INFO L87 Difference]: Start difference. First operand 904 states and 2158 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:40,207 INFO L93 Difference]: Finished difference Result 2354 states and 5793 transitions. [2021-08-21 12:31:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:31:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:40,211 INFO L225 Difference]: With dead ends: 2354 [2021-08-21 12:31:40,211 INFO L226 Difference]: Without dead ends: 2332 [2021-08-21 12:31:40,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1133.0ms TimeCoverageRelationStatistics Valid=338, Invalid=1384, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:31:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-08-21 12:31:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 910. [2021-08-21 12:31:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.394939493949395) internal successors, (2177), 909 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2177 transitions. [2021-08-21 12:31:40,226 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2177 transitions. Word has length 29 [2021-08-21 12:31:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:40,226 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2177 transitions. [2021-08-21 12:31:40,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2177 transitions. [2021-08-21 12:31:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:40,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:40,228 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:40,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:40,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 12:31:40,445 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash -324782305, now seen corresponding path program 39 times [2021-08-21 12:31:40,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:40,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938735361] [2021-08-21 12:31:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:40,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:40,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:40,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938735361] [2021-08-21 12:31:40,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938735361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:40,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419660469] [2021-08-21 12:31:40,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:31:40,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:40,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:40,829 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:40,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:31:42,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:31:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:42,881 INFO L388 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 19 treesize of output 11 [2021-08-21 12:31:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:42,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419660469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:42,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:42,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-08-21 12:31:42,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351227404] [2021-08-21 12:31:42,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:31:42,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:31:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:31:42,974 INFO L87 Difference]: Start difference. First operand 910 states and 2177 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:43,948 INFO L93 Difference]: Finished difference Result 2330 states and 5739 transitions. [2021-08-21 12:31:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:31:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:43,951 INFO L225 Difference]: With dead ends: 2330 [2021-08-21 12:31:43,951 INFO L226 Difference]: Without dead ends: 2319 [2021-08-21 12:31:43,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:31:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-08-21 12:31:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 926. [2021-08-21 12:31:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 2.398918918918919) internal successors, (2219), 925 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2219 transitions. [2021-08-21 12:31:43,968 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2219 transitions. Word has length 29 [2021-08-21 12:31:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:43,968 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 2219 transitions. [2021-08-21 12:31:43,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2219 transitions. [2021-08-21 12:31:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:43,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:43,970 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:43,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 12:31:44,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:44,191 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1431618745, now seen corresponding path program 40 times [2021-08-21 12:31:44,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:44,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87272938] [2021-08-21 12:31:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:44,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:44,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:44,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87272938] [2021-08-21 12:31:44,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87272938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:44,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357296416] [2021-08-21 12:31:44,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:31:44,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:44,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:44,512 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:44,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:31:46,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:31:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:31:46,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:31:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:46,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357296416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:46,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:46,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:31:46,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692487761] [2021-08-21 12:31:46,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:31:46,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:31:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:31:46,715 INFO L87 Difference]: Start difference. First operand 926 states and 2219 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:47,916 INFO L93 Difference]: Finished difference Result 2523 states and 6199 transitions. [2021-08-21 12:31:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:31:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:47,920 INFO L225 Difference]: With dead ends: 2523 [2021-08-21 12:31:47,920 INFO L226 Difference]: Without dead ends: 2501 [2021-08-21 12:31:47,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 995.6ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:31:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-08-21 12:31:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 915. [2021-08-21 12:31:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.394967177242888) internal successors, (2189), 914 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2189 transitions. [2021-08-21 12:31:47,935 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2189 transitions. Word has length 29 [2021-08-21 12:31:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:47,935 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2189 transitions. [2021-08-21 12:31:47,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2189 transitions. [2021-08-21 12:31:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:47,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:47,936 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:47,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:48,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:48,137 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1452966191, now seen corresponding path program 41 times [2021-08-21 12:31:48,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:48,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803707063] [2021-08-21 12:31:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:48,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:48,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:48,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803707063] [2021-08-21 12:31:48,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803707063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:48,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933926584] [2021-08-21 12:31:48,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:48,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:48,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:48,530 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:48,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:31:50,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:31:50,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:50,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:31:50,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:31:50,754 INFO L388 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 27 treesize of output 15 [2021-08-21 12:31:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933926584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:50,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:31:50,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267257952] [2021-08-21 12:31:50,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:31:50,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:50,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:31:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:31:50,830 INFO L87 Difference]: Start difference. First operand 915 states and 2189 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:51,906 INFO L93 Difference]: Finished difference Result 2142 states and 5206 transitions. [2021-08-21 12:31:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:31:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:51,909 INFO L225 Difference]: With dead ends: 2142 [2021-08-21 12:31:51,909 INFO L226 Difference]: Without dead ends: 2132 [2021-08-21 12:31:51,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 809.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:31:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-08-21 12:31:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 913. [2021-08-21 12:31:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 2.3947368421052633) internal successors, (2184), 912 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 2184 transitions. [2021-08-21 12:31:51,924 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 2184 transitions. Word has length 29 [2021-08-21 12:31:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:51,924 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 2184 transitions. [2021-08-21 12:31:51,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 2184 transitions. [2021-08-21 12:31:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:51,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:51,926 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:51,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:52,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 12:31:52,141 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1782324961, now seen corresponding path program 42 times [2021-08-21 12:31:52,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:52,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708622776] [2021-08-21 12:31:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:52,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:52,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:52,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708622776] [2021-08-21 12:31:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708622776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:52,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113817814] [2021-08-21 12:31:52,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:52,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:52,568 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:52,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:31:54,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:31:54,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:54,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:54,841 INFO L388 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 19 treesize of output 11 [2021-08-21 12:31:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:54,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113817814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:54,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:54,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:31:54,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115932538] [2021-08-21 12:31:54,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:31:54,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:54,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:31:54,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:31:54,928 INFO L87 Difference]: Start difference. First operand 913 states and 2184 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:56,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:56,616 INFO L93 Difference]: Finished difference Result 2177 states and 5288 transitions. [2021-08-21 12:31:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:31:56,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:31:56,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:56,620 INFO L225 Difference]: With dead ends: 2177 [2021-08-21 12:31:56,620 INFO L226 Difference]: Without dead ends: 2142 [2021-08-21 12:31:56,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1368.5ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:31:56,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-08-21 12:31:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 916. [2021-08-21 12:31:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.394535519125683) internal successors, (2191), 915 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2191 transitions. [2021-08-21 12:31:56,639 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2191 transitions. Word has length 29 [2021-08-21 12:31:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 2191 transitions. [2021-08-21 12:31:56,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2191 transitions. [2021-08-21 12:31:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:31:56,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:56,641 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:56,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:56,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:31:56,865 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1014151221, now seen corresponding path program 43 times [2021-08-21 12:31:56,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:56,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859822193] [2021-08-21 12:31:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:56,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:57,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:57,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859822193] [2021-08-21 12:31:57,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859822193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:57,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842132645] [2021-08-21 12:31:57,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:57,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:57,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:57,263 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:31:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:31:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:59,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:31:59,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:59,570 INFO L388 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 19 treesize of output 11 [2021-08-21 12:31:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:59,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842132645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:59,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:59,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:31:59,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952462830] [2021-08-21 12:31:59,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:31:59,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:31:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:31:59,645 INFO L87 Difference]: Start difference. First operand 916 states and 2191 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:01,337 INFO L93 Difference]: Finished difference Result 2085 states and 5107 transitions. [2021-08-21 12:32:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:32:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:01,340 INFO L225 Difference]: With dead ends: 2085 [2021-08-21 12:32:01,340 INFO L226 Difference]: Without dead ends: 2068 [2021-08-21 12:32:01,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1139.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:32:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-08-21 12:32:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 941. [2021-08-21 12:32:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.3946808510638298) internal successors, (2251), 940 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2251 transitions. [2021-08-21 12:32:01,353 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2251 transitions. Word has length 29 [2021-08-21 12:32:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:01,354 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 2251 transitions. [2021-08-21 12:32:01,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2251 transitions. [2021-08-21 12:32:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:01,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:01,355 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:01,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 12:32:01,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:32:01,556 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1287822959, now seen corresponding path program 44 times [2021-08-21 12:32:01,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:01,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634735561] [2021-08-21 12:32:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:01,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:01,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:01,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634735561] [2021-08-21 12:32:01,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634735561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:01,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806257190] [2021-08-21 12:32:01,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:32:01,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:01,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:01,945 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:01,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:32:03,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:32:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:04,251 INFO L388 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 19 treesize of output 11 [2021-08-21 12:32:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:04,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806257190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:04,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:04,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:32:04,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203421980] [2021-08-21 12:32:04,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:32:04,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:32:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:04,361 INFO L87 Difference]: Start difference. First operand 941 states and 2251 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:06,327 INFO L93 Difference]: Finished difference Result 2586 states and 6359 transitions. [2021-08-21 12:32:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:32:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:06,331 INFO L225 Difference]: With dead ends: 2586 [2021-08-21 12:32:06,331 INFO L226 Difference]: Without dead ends: 2571 [2021-08-21 12:32:06,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1541.2ms TimeCoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:32:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-08-21 12:32:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 953. [2021-08-21 12:32:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.3949579831932772) internal successors, (2280), 952 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2280 transitions. [2021-08-21 12:32:06,350 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2280 transitions. Word has length 29 [2021-08-21 12:32:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:06,351 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 2280 transitions. [2021-08-21 12:32:06,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2280 transitions. [2021-08-21 12:32:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:06,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:06,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:06,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:06,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:06,577 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1953026127, now seen corresponding path program 45 times [2021-08-21 12:32:06,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:06,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679169787] [2021-08-21 12:32:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:06,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:06,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:06,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679169787] [2021-08-21 12:32:06,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679169787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:06,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715061556] [2021-08-21 12:32:06,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:32:06,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:06,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:06,960 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:06,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:32:08,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:32:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:32:09,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:32:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:09,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715061556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:09,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:09,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:32:09,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909750064] [2021-08-21 12:32:09,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:32:09,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:32:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:09,417 INFO L87 Difference]: Start difference. First operand 953 states and 2280 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:10,989 INFO L93 Difference]: Finished difference Result 2274 states and 5595 transitions. [2021-08-21 12:32:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:32:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:10,993 INFO L225 Difference]: With dead ends: 2274 [2021-08-21 12:32:10,993 INFO L226 Difference]: Without dead ends: 2255 [2021-08-21 12:32:10,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1129.8ms TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:32:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-08-21 12:32:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 975. [2021-08-21 12:32:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.406570841889117) internal successors, (2344), 974 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2344 transitions. [2021-08-21 12:32:11,007 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2344 transitions. Word has length 29 [2021-08-21 12:32:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:11,007 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2344 transitions. [2021-08-21 12:32:11,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2344 transitions. [2021-08-21 12:32:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:11,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:11,009 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:11,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 12:32:11,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:32:11,209 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:11,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1441520993, now seen corresponding path program 46 times [2021-08-21 12:32:11,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:11,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367381592] [2021-08-21 12:32:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:11,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:11,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:11,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367381592] [2021-08-21 12:32:11,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367381592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:11,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115432336] [2021-08-21 12:32:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:32:11,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:11,617 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:11,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:32:13,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:32:13,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:13,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:14,013 INFO L388 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 19 treesize of output 11 [2021-08-21 12:32:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:14,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115432336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:14,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:14,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-08-21 12:32:14,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034221298] [2021-08-21 12:32:14,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:32:14,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:32:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:14,133 INFO L87 Difference]: Start difference. First operand 975 states and 2344 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-21 12:32:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:15,334 INFO L93 Difference]: Finished difference Result 2727 states and 6809 transitions. [2021-08-21 12:32:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:32:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 29 [2021-08-21 12:32:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:15,339 INFO L225 Difference]: With dead ends: 2727 [2021-08-21 12:32:15,339 INFO L226 Difference]: Without dead ends: 2710 [2021-08-21 12:32:15,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:32:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-08-21 12:32:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 987. [2021-08-21 12:32:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.4077079107505073) internal successors, (2374), 986 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2374 transitions. [2021-08-21 12:32:15,361 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2374 transitions. Word has length 29 [2021-08-21 12:32:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:15,362 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2374 transitions. [2021-08-21 12:32:15,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-21 12:32:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2374 transitions. [2021-08-21 12:32:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:15,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:15,364 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:15,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 12:32:15,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:32:15,577 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash 314880057, now seen corresponding path program 47 times [2021-08-21 12:32:15,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:15,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430593476] [2021-08-21 12:32:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:15,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:15,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:15,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430593476] [2021-08-21 12:32:15,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430593476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:15,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589294470] [2021-08-21 12:32:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:32:15,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:15,941 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:15,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:32:18,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:32:18,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:18,475 INFO L388 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 19 treesize of output 11 [2021-08-21 12:32:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:18,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589294470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:18,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:18,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:32:18,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201166303] [2021-08-21 12:32:18,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:32:18,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:32:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:32:18,577 INFO L87 Difference]: Start difference. First operand 987 states and 2374 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:32:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:20,006 INFO L93 Difference]: Finished difference Result 2467 states and 6126 transitions. [2021-08-21 12:32:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:32:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:32:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:20,010 INFO L225 Difference]: With dead ends: 2467 [2021-08-21 12:32:20,010 INFO L226 Difference]: Without dead ends: 2456 [2021-08-21 12:32:20,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1226.7ms TimeCoverageRelationStatistics Valid=424, Invalid=1556, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:32:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-08-21 12:32:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 986. [2021-08-21 12:32:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 2.4081218274111675) internal successors, (2372), 985 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2372 transitions. [2021-08-21 12:32:20,025 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2372 transitions. Word has length 29 [2021-08-21 12:32:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:20,025 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 2372 transitions. [2021-08-21 12:32:20,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:32:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2372 transitions. [2021-08-21 12:32:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:20,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:20,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:20,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 12:32:20,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:20,228 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1843834125, now seen corresponding path program 48 times [2021-08-21 12:32:20,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:20,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898873381] [2021-08-21 12:32:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:20,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:20,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:20,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898873381] [2021-08-21 12:32:20,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898873381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:20,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127548232] [2021-08-21 12:32:20,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:32:20,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:20,618 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:20,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:32:22,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:32:22,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:23,211 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 12:32:23,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-08-21 12:32:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:23,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127548232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:23,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:23,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 12:32:23,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695585891] [2021-08-21 12:32:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:32:23,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:23,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:32:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:23,291 INFO L87 Difference]: Start difference. First operand 986 states and 2372 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:24,618 INFO L93 Difference]: Finished difference Result 2258 states and 5551 transitions. [2021-08-21 12:32:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:32:24,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:24,621 INFO L225 Difference]: With dead ends: 2258 [2021-08-21 12:32:24,621 INFO L226 Difference]: Without dead ends: 2248 [2021-08-21 12:32:24,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 934.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:32:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-08-21 12:32:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 985. [2021-08-21 12:32:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.408536585365854) internal successors, (2370), 984 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2370 transitions. [2021-08-21 12:32:24,634 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2370 transitions. Word has length 29 [2021-08-21 12:32:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:24,635 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 2370 transitions. [2021-08-21 12:32:24,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2370 transitions. [2021-08-21 12:32:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:24,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:24,636 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:24,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:24,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 12:32:24,837 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 669763807, now seen corresponding path program 49 times [2021-08-21 12:32:24,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:24,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562520476] [2021-08-21 12:32:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:24,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:25,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:25,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562520476] [2021-08-21 12:32:25,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562520476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:25,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819495758] [2021-08-21 12:32:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:32:25,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:25,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:25,207 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:25,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:32:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:27,809 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-21 12:32:27,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-08-21 12:32:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:27,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819495758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:27,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:27,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:32:27,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529095673] [2021-08-21 12:32:27,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:32:27,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:32:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:27,892 INFO L87 Difference]: Start difference. First operand 985 states and 2370 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:29,369 INFO L93 Difference]: Finished difference Result 2302 states and 5621 transitions. [2021-08-21 12:32:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:32:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:29,373 INFO L225 Difference]: With dead ends: 2302 [2021-08-21 12:32:29,373 INFO L226 Difference]: Without dead ends: 2285 [2021-08-21 12:32:29,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1015.2ms TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:32:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-21 12:32:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1003. [2021-08-21 12:32:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.4121756487025947) internal successors, (2417), 1002 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2417 transitions. [2021-08-21 12:32:29,388 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2417 transitions. Word has length 29 [2021-08-21 12:32:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:29,388 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 2417 transitions. [2021-08-21 12:32:29,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2417 transitions. [2021-08-21 12:32:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:29,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:29,390 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:29,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 12:32:29,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:29,590 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash 943435545, now seen corresponding path program 50 times [2021-08-21 12:32:29,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:29,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786036468] [2021-08-21 12:32:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:29,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:29,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:29,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786036468] [2021-08-21 12:32:29,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786036468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:29,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462805629] [2021-08-21 12:32:29,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:32:29,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:29,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:29,969 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:29,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:32:32,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:32:32,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:32,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:32,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:32,593 INFO L388 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 19 treesize of output 11 [2021-08-21 12:32:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:32,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462805629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:32,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:32,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:32:32,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949734389] [2021-08-21 12:32:32,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:32:32,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:32:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:32,693 INFO L87 Difference]: Start difference. First operand 1003 states and 2417 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:34,230 INFO L93 Difference]: Finished difference Result 2712 states and 6677 transitions. [2021-08-21 12:32:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:32:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:34,234 INFO L225 Difference]: With dead ends: 2712 [2021-08-21 12:32:34,234 INFO L226 Difference]: Without dead ends: 2699 [2021-08-21 12:32:34,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1222.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:32:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-08-21 12:32:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 1019. [2021-08-21 12:32:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.4145383104125737) internal successors, (2458), 1018 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2458 transitions. [2021-08-21 12:32:34,251 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2458 transitions. Word has length 29 [2021-08-21 12:32:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:34,252 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2458 transitions. [2021-08-21 12:32:34,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2458 transitions. [2021-08-21 12:32:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:34,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:34,253 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:34,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 12:32:34,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 12:32:34,454 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1608638713, now seen corresponding path program 51 times [2021-08-21 12:32:34,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:34,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992917142] [2021-08-21 12:32:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:34,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:34,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:34,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992917142] [2021-08-21 12:32:34,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992917142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:34,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387899709] [2021-08-21 12:32:34,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:32:34,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:34,822 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:34,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:32:37,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:32:37,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:37,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:37,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:32:37,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:32:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387899709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:37,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:37,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:32:37,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13432927] [2021-08-21 12:32:37,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:32:37,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:32:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:37,627 INFO L87 Difference]: Start difference. First operand 1019 states and 2458 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:39,019 INFO L93 Difference]: Finished difference Result 2394 states and 5900 transitions. [2021-08-21 12:32:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:32:39,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:39,023 INFO L225 Difference]: With dead ends: 2394 [2021-08-21 12:32:39,023 INFO L226 Difference]: Without dead ends: 2376 [2021-08-21 12:32:39,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1040.8ms TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:32:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-08-21 12:32:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 995. [2021-08-21 12:32:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.4114688128772634) internal successors, (2397), 994 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2397 transitions. [2021-08-21 12:32:39,038 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2397 transitions. Word has length 29 [2021-08-21 12:32:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:39,038 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 2397 transitions. [2021-08-21 12:32:39,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2397 transitions. [2021-08-21 12:32:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:39,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:39,040 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:39,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:32:39,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:32:39,240 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash 357875503, now seen corresponding path program 52 times [2021-08-21 12:32:39,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:39,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313193645] [2021-08-21 12:32:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:39,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:39,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:39,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313193645] [2021-08-21 12:32:39,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313193645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:39,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651827301] [2021-08-21 12:32:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:32:39,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:39,612 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:39,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:32:41,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:32:41,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:41,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:42,391 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-21 12:32:42,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-08-21 12:32:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:42,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651827301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:42,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:42,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:32:42,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478363108] [2021-08-21 12:32:42,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:32:42,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:42,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:32:42,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:42,466 INFO L87 Difference]: Start difference. First operand 995 states and 2397 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:43,507 INFO L93 Difference]: Finished difference Result 2145 states and 5248 transitions. [2021-08-21 12:32:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:32:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:43,510 INFO L225 Difference]: With dead ends: 2145 [2021-08-21 12:32:43,510 INFO L226 Difference]: Without dead ends: 2136 [2021-08-21 12:32:43,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 741.8ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:32:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-08-21 12:32:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 997. [2021-08-21 12:32:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.4096385542168677) internal successors, (2400), 996 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2400 transitions. [2021-08-21 12:32:43,524 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2400 transitions. Word has length 29 [2021-08-21 12:32:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:43,524 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 2400 transitions. [2021-08-21 12:32:43,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2400 transitions. [2021-08-21 12:32:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:43,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:43,525 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:43,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:43,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:43,726 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1755234587, now seen corresponding path program 53 times [2021-08-21 12:32:43,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:43,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636004928] [2021-08-21 12:32:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:43,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:44,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:44,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636004928] [2021-08-21 12:32:44,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636004928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:44,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763481340] [2021-08-21 12:32:44,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:32:44,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:44,173 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:44,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:32:46,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:32:46,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:46,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:47,033 INFO L388 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 19 treesize of output 11 [2021-08-21 12:32:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:47,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763481340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:47,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:47,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:32:47,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549387582] [2021-08-21 12:32:47,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:32:47,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:32:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:32:47,104 INFO L87 Difference]: Start difference. First operand 997 states and 2400 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:48,135 INFO L93 Difference]: Finished difference Result 2391 states and 5868 transitions. [2021-08-21 12:32:48,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:32:48,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:48,138 INFO L225 Difference]: With dead ends: 2391 [2021-08-21 12:32:48,138 INFO L226 Difference]: Without dead ends: 2382 [2021-08-21 12:32:48,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:32:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-08-21 12:32:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1033. [2021-08-21 12:32:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.4069767441860463) internal successors, (2484), 1032 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2484 transitions. [2021-08-21 12:32:48,153 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2484 transitions. Word has length 29 [2021-08-21 12:32:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:48,153 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 2484 transitions. [2021-08-21 12:32:48,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2484 transitions. [2021-08-21 12:32:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:48,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:48,155 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:48,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 12:32:48,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:48,355 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2044962201, now seen corresponding path program 54 times [2021-08-21 12:32:48,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:48,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344982836] [2021-08-21 12:32:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:48,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:48,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:48,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344982836] [2021-08-21 12:32:48,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344982836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:48,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876710922] [2021-08-21 12:32:48,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:32:48,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:48,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:48,769 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:48,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:32:51,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:32:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:51,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:32:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:51,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:32:51,812 INFO L388 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 31 treesize of output 47 [2021-08-21 12:32:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:52,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876710922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:52,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:52,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 12:32:52,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719167768] [2021-08-21 12:32:52,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:32:52,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:32:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:32:52,509 INFO L87 Difference]: Start difference. First operand 1033 states and 2484 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:54,938 INFO L93 Difference]: Finished difference Result 2480 states and 6040 transitions. [2021-08-21 12:32:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:32:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:54,941 INFO L225 Difference]: With dead ends: 2480 [2021-08-21 12:32:54,941 INFO L226 Difference]: Without dead ends: 2461 [2021-08-21 12:32:54,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2087.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2317, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 12:32:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-08-21 12:32:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1052. [2021-08-21 12:32:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.4100856327307327) internal successors, (2533), 1051 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2533 transitions. [2021-08-21 12:32:54,962 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2533 transitions. Word has length 29 [2021-08-21 12:32:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:54,962 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 2533 transitions. [2021-08-21 12:32:54,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2533 transitions. [2021-08-21 12:32:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:54,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:54,964 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:55,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:55,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:55,190 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash -151457595, now seen corresponding path program 55 times [2021-08-21 12:32:55,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:55,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909990174] [2021-08-21 12:32:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:55,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:55,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:55,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909990174] [2021-08-21 12:32:55,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909990174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:55,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095364542] [2021-08-21 12:32:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:32:55,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:55,556 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:32:55,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:32:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:32:58,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:32:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:32:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095364542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:58,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:58,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:32:58,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020860565] [2021-08-21 12:32:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:32:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:32:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:32:58,603 INFO L87 Difference]: Start difference. First operand 1052 states and 2533 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:59,954 INFO L93 Difference]: Finished difference Result 2981 states and 7350 transitions. [2021-08-21 12:32:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:32:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:32:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:59,958 INFO L225 Difference]: With dead ends: 2981 [2021-08-21 12:32:59,959 INFO L226 Difference]: Without dead ends: 2968 [2021-08-21 12:32:59,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:32:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-08-21 12:32:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1068. [2021-08-21 12:32:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 2.4123711340206184) internal successors, (2574), 1067 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 2574 transitions. [2021-08-21 12:32:59,975 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 2574 transitions. Word has length 29 [2021-08-21 12:32:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:59,975 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 2574 transitions. [2021-08-21 12:32:59,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 2574 transitions. [2021-08-21 12:32:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:32:59,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:59,977 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:59,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 12:33:00,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 12:33:00,178 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:00,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:00,178 INFO L82 PathProgramCache]: Analyzing trace with hash 513745573, now seen corresponding path program 56 times [2021-08-21 12:33:00,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:00,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241719476] [2021-08-21 12:33:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:00,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:00,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:00,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241719476] [2021-08-21 12:33:00,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241719476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:00,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380204164] [2021-08-21 12:33:00,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:33:00,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:00,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:00,576 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:00,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:33:03,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:33:03,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:03,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:03,553 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 12:33:03,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 62 [2021-08-21 12:33:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:03,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380204164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:03,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:03,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:33:03,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310504285] [2021-08-21 12:33:03,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:33:03,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:33:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:33:03,645 INFO L87 Difference]: Start difference. First operand 1068 states and 2574 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:04,748 INFO L93 Difference]: Finished difference Result 2423 states and 5963 transitions. [2021-08-21 12:33:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:33:04,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:04,751 INFO L225 Difference]: With dead ends: 2423 [2021-08-21 12:33:04,751 INFO L226 Difference]: Without dead ends: 2405 [2021-08-21 12:33:04,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:33:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-08-21 12:33:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1036. [2021-08-21 12:33:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.4067632850241547) internal successors, (2491), 1035 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2491 transitions. [2021-08-21 12:33:04,766 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2491 transitions. Word has length 29 [2021-08-21 12:33:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:04,766 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 2491 transitions. [2021-08-21 12:33:04,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2491 transitions. [2021-08-21 12:33:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:04,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:04,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:04,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:04,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:33:04,969 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash 200685415, now seen corresponding path program 57 times [2021-08-21 12:33:04,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:04,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104136533] [2021-08-21 12:33:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:04,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:05,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:05,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104136533] [2021-08-21 12:33:05,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104136533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:05,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876901229] [2021-08-21 12:33:05,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:33:05,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:05,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:05,377 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:05,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:33:08,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:33:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:08,488 INFO L388 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 19 treesize of output 11 [2021-08-21 12:33:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:08,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876901229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:08,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:08,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:33:08,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947955576] [2021-08-21 12:33:08,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:33:08,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:33:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:33:08,558 INFO L87 Difference]: Start difference. First operand 1036 states and 2491 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:09,556 INFO L93 Difference]: Finished difference Result 2376 states and 5821 transitions. [2021-08-21 12:33:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:33:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:09,560 INFO L225 Difference]: With dead ends: 2376 [2021-08-21 12:33:09,560 INFO L226 Difference]: Without dead ends: 2367 [2021-08-21 12:33:09,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:33:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-21 12:33:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1033. [2021-08-21 12:33:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.4069767441860463) internal successors, (2484), 1032 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2484 transitions. [2021-08-21 12:33:09,582 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2484 transitions. Word has length 29 [2021-08-21 12:33:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:09,582 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 2484 transitions. [2021-08-21 12:33:09,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2484 transitions. [2021-08-21 12:33:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:09,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:09,584 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:09,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:09,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:09,813 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash -375581373, now seen corresponding path program 58 times [2021-08-21 12:33:09,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:09,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157508247] [2021-08-21 12:33:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:09,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:10,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:10,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157508247] [2021-08-21 12:33:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157508247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:10,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768825570] [2021-08-21 12:33:10,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:33:10,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:10,211 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:33:12,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:33:12,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:12,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:12,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:13,346 INFO L388 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 19 treesize of output 11 [2021-08-21 12:33:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:13,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768825570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:13,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:13,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:33:13,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982623652] [2021-08-21 12:33:13,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:33:13,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:33:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:33:13,417 INFO L87 Difference]: Start difference. First operand 1033 states and 2484 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:14,832 INFO L93 Difference]: Finished difference Result 2356 states and 5797 transitions. [2021-08-21 12:33:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:33:14,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:14,835 INFO L225 Difference]: With dead ends: 2356 [2021-08-21 12:33:14,835 INFO L226 Difference]: Without dead ends: 2339 [2021-08-21 12:33:14,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1053.4ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:33:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-08-21 12:33:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 1054. [2021-08-21 12:33:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.41025641025641) internal successors, (2538), 1053 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 2538 transitions. [2021-08-21 12:33:14,849 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 2538 transitions. Word has length 29 [2021-08-21 12:33:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:14,850 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 2538 transitions. [2021-08-21 12:33:14,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 2538 transitions. [2021-08-21 12:33:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:14,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:14,851 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:14,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:15,052 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash -101909635, now seen corresponding path program 59 times [2021-08-21 12:33:15,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:15,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44058123] [2021-08-21 12:33:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:15,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:15,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:15,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44058123] [2021-08-21 12:33:15,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44058123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:15,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728527168] [2021-08-21 12:33:15,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:33:15,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:15,478 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:33:18,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:33:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:33:18,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:33:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:18,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728527168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:18,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:18,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:33:18,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314139049] [2021-08-21 12:33:18,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:33:18,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:18,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:33:18,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:33:18,701 INFO L87 Difference]: Start difference. First operand 1054 states and 2538 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:20,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:20,386 INFO L93 Difference]: Finished difference Result 2890 states and 7138 transitions. [2021-08-21 12:33:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:33:20,387 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:20,390 INFO L225 Difference]: With dead ends: 2890 [2021-08-21 12:33:20,390 INFO L226 Difference]: Without dead ends: 2875 [2021-08-21 12:33:20,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1314.9ms TimeCoverageRelationStatistics Valid=428, Invalid=1734, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:33:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-08-21 12:33:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1066. [2021-08-21 12:33:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 2.4103286384976528) internal successors, (2567), 1065 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 2567 transitions. [2021-08-21 12:33:20,423 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 2567 transitions. Word has length 29 [2021-08-21 12:33:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:20,423 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 2567 transitions. [2021-08-21 12:33:20,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 2567 transitions. [2021-08-21 12:33:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:20,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:20,425 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:20,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 12:33:20,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:20,625 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:20,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:20,626 INFO L82 PathProgramCache]: Analyzing trace with hash 563293533, now seen corresponding path program 60 times [2021-08-21 12:33:20,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:20,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969630677] [2021-08-21 12:33:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:20,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:21,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:21,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969630677] [2021-08-21 12:33:21,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969630677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:21,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268563578] [2021-08-21 12:33:21,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:33:21,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:21,003 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:21,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:33:23,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:33:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:23,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:33:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:24,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:33:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-08-21 12:33:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:24,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268563578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:24,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:24,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-21 12:33:24,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725639709] [2021-08-21 12:33:24,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:33:24,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:33:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:33:24,603 INFO L87 Difference]: Start difference. First operand 1066 states and 2567 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:26,156 INFO L93 Difference]: Finished difference Result 2353 states and 5790 transitions. [2021-08-21 12:33:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:33:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:26,160 INFO L225 Difference]: With dead ends: 2353 [2021-08-21 12:33:26,160 INFO L226 Difference]: Without dead ends: 2335 [2021-08-21 12:33:26,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1087.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:33:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-21 12:33:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1074. [2021-08-21 12:33:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.412861136999068) internal successors, (2589), 1073 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2589 transitions. [2021-08-21 12:33:26,175 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2589 transitions. Word has length 29 [2021-08-21 12:33:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:26,176 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 2589 transitions. [2021-08-21 12:33:26,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2589 transitions. [2021-08-21 12:33:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:26,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:26,177 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:26,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 12:33:26,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:26,378 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1463713709, now seen corresponding path program 61 times [2021-08-21 12:33:26,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:26,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358569820] [2021-08-21 12:33:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:26,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:26,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:26,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358569820] [2021-08-21 12:33:26,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358569820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:26,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633769464] [2021-08-21 12:33:26,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:33:26,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:26,766 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:26,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:33:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:29,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:30,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:33:30,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:33:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:30,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633769464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:30,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:30,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:33:30,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254282214] [2021-08-21 12:33:30,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:33:30,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:33:30,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:33:30,127 INFO L87 Difference]: Start difference. First operand 1074 states and 2589 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:33:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:31,767 INFO L93 Difference]: Finished difference Result 3032 states and 7588 transitions. [2021-08-21 12:33:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:33:31,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:33:31,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:31,771 INFO L225 Difference]: With dead ends: 3032 [2021-08-21 12:33:31,771 INFO L226 Difference]: Without dead ends: 3019 [2021-08-21 12:33:31,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1188.7ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:33:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-08-21 12:33:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 1083. [2021-08-21 12:33:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.4149722735674675) internal successors, (2613), 1082 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2613 transitions. [2021-08-21 12:33:31,790 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2613 transitions. Word has length 29 [2021-08-21 12:33:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:31,790 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2613 transitions. [2021-08-21 12:33:31,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:33:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2613 transitions. [2021-08-21 12:33:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:31,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:31,792 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:31,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:31,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:33:31,992 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1074852537, now seen corresponding path program 62 times [2021-08-21 12:33:31,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:31,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112195942] [2021-08-21 12:33:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:31,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:32,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:32,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112195942] [2021-08-21 12:33:32,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112195942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:32,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199993328] [2021-08-21 12:33:32,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:33:32,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:32,340 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:32,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:33:35,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:33:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:35,674 INFO L388 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 19 treesize of output 11 [2021-08-21 12:33:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:35,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199993328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:35,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:35,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:33:35,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145818430] [2021-08-21 12:33:35,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:33:35,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:33:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:33:35,793 INFO L87 Difference]: Start difference. First operand 1083 states and 2613 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:33:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:37,273 INFO L93 Difference]: Finished difference Result 2602 states and 6465 transitions. [2021-08-21 12:33:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:33:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:33:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:37,276 INFO L225 Difference]: With dead ends: 2602 [2021-08-21 12:33:37,276 INFO L226 Difference]: Without dead ends: 2585 [2021-08-21 12:33:37,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1162.9ms TimeCoverageRelationStatistics Valid=308, Invalid=1414, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:33:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-08-21 12:33:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 1083. [2021-08-21 12:33:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.4149722735674675) internal successors, (2613), 1082 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2613 transitions. [2021-08-21 12:33:37,292 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2613 transitions. Word has length 29 [2021-08-21 12:33:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:37,292 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2613 transitions. [2021-08-21 12:33:37,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:33:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2613 transitions. [2021-08-21 12:33:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:37,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:37,293 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:37,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:37,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:37,494 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash 454101531, now seen corresponding path program 63 times [2021-08-21 12:33:37,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:37,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653918477] [2021-08-21 12:33:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:37,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:37,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:37,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653918477] [2021-08-21 12:33:37,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653918477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:37,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802984507] [2021-08-21 12:33:37,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:33:37,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:37,830 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:37,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:33:40,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:33:40,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:40,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:33:40,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:41,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:33:41,422 INFO L388 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 31 treesize of output 47 [2021-08-21 12:33:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:42,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802984507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:42,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:42,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-21 12:33:42,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921674139] [2021-08-21 12:33:42,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:33:42,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:33:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:33:42,142 INFO L87 Difference]: Start difference. First operand 1083 states and 2613 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:45,308 INFO L93 Difference]: Finished difference Result 2260 states and 5572 transitions. [2021-08-21 12:33:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:33:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:45,313 INFO L225 Difference]: With dead ends: 2260 [2021-08-21 12:33:45,313 INFO L226 Difference]: Without dead ends: 2250 [2021-08-21 12:33:45,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2117.8ms TimeCoverageRelationStatistics Valid=361, Invalid=2719, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:33:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-08-21 12:33:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 1085. [2021-08-21 12:33:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.415129151291513) internal successors, (2618), 1084 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2618 transitions. [2021-08-21 12:33:45,331 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2618 transitions. Word has length 29 [2021-08-21 12:33:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:45,331 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2618 transitions. [2021-08-21 12:33:45,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2618 transitions. [2021-08-21 12:33:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:45,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:45,333 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:45,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 12:33:45,561 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash -213576143, now seen corresponding path program 64 times [2021-08-21 12:33:45,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:45,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552803645] [2021-08-21 12:33:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:45,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:45,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:45,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552803645] [2021-08-21 12:33:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552803645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:45,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342784046] [2021-08-21 12:33:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:33:45,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:45,959 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:45,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:33:48,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:33:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:48,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:33:49,465 INFO L388 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 27 treesize of output 15 [2021-08-21 12:33:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:49,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342784046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:49,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:49,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:33:49,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212588277] [2021-08-21 12:33:49,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:33:49,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:49,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:33:49,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:33:49,543 INFO L87 Difference]: Start difference. First operand 1085 states and 2618 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:50,901 INFO L93 Difference]: Finished difference Result 2556 states and 6268 transitions. [2021-08-21 12:33:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:33:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:50,905 INFO L225 Difference]: With dead ends: 2556 [2021-08-21 12:33:50,905 INFO L226 Difference]: Without dead ends: 2539 [2021-08-21 12:33:50,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1132, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:33:50,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-08-21 12:33:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1103. [2021-08-21 12:33:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 2.4183303085299457) internal successors, (2665), 1102 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 2665 transitions. [2021-08-21 12:33:50,921 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 2665 transitions. Word has length 29 [2021-08-21 12:33:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:50,921 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 2665 transitions. [2021-08-21 12:33:50,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 2665 transitions. [2021-08-21 12:33:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:50,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:50,922 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:50,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:51,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:33:51,124 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash 60095595, now seen corresponding path program 65 times [2021-08-21 12:33:51,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:51,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896004712] [2021-08-21 12:33:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:51,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:51,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:51,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896004712] [2021-08-21 12:33:51,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896004712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:51,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39695175] [2021-08-21 12:33:51,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:33:51,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:51,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:51,477 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:51,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:33:54,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:33:54,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:33:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:55,041 INFO L388 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 19 treesize of output 11 [2021-08-21 12:33:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:55,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39695175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:55,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:55,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:33:55,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44660781] [2021-08-21 12:33:55,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:33:55,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:33:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:33:55,144 INFO L87 Difference]: Start difference. First operand 1103 states and 2665 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:56,549 INFO L93 Difference]: Finished difference Result 3012 states and 7436 transitions. [2021-08-21 12:33:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:33:56,550 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:33:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:56,553 INFO L225 Difference]: With dead ends: 3012 [2021-08-21 12:33:56,553 INFO L226 Difference]: Without dead ends: 2999 [2021-08-21 12:33:56,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1139.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:33:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2021-08-21 12:33:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 1098. [2021-08-21 12:33:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.4193254329990883) internal successors, (2654), 1097 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2654 transitions. [2021-08-21 12:33:56,571 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2654 transitions. Word has length 29 [2021-08-21 12:33:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:56,571 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 2654 transitions. [2021-08-21 12:33:56,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2654 transitions. [2021-08-21 12:33:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:33:56,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:56,573 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:56,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:56,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:33:56,773 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash 725298763, now seen corresponding path program 66 times [2021-08-21 12:33:56,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:56,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652073360] [2021-08-21 12:33:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:56,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:57,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:57,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652073360] [2021-08-21 12:33:57,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652073360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:57,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033331280] [2021-08-21 12:33:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:33:57,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:57,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:57,181 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:33:57,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:34:00,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:34:00,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:00,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:34:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:00,811 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-08-21 12:34:00,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 86 [2021-08-21 12:34:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:01,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033331280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:01,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:01,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-21 12:34:01,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129856415] [2021-08-21 12:34:01,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:34:01,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:34:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:34:01,082 INFO L87 Difference]: Start difference. First operand 1098 states and 2654 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:02,458 INFO L93 Difference]: Finished difference Result 2440 states and 6015 transitions. [2021-08-21 12:34:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:34:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:02,461 INFO L225 Difference]: With dead ends: 2440 [2021-08-21 12:34:02,461 INFO L226 Difference]: Without dead ends: 2422 [2021-08-21 12:34:02,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 956.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:34:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-08-21 12:34:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1101. [2021-08-21 12:34:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.419090909090909) internal successors, (2661), 1100 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2661 transitions. [2021-08-21 12:34:02,476 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2661 transitions. Word has length 29 [2021-08-21 12:34:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:02,476 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 2661 transitions. [2021-08-21 12:34:02,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2661 transitions. [2021-08-21 12:34:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:02,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:02,477 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:02,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:02,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 12:34:02,678 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:02,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:02,678 INFO L82 PathProgramCache]: Analyzing trace with hash -525464447, now seen corresponding path program 67 times [2021-08-21 12:34:02,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:02,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144619417] [2021-08-21 12:34:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:02,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:03,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:03,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144619417] [2021-08-21 12:34:03,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144619417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:03,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580797597] [2021-08-21 12:34:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:34:03,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:03,016 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:03,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:34:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:06,658 INFO L388 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 19 treesize of output 11 [2021-08-21 12:34:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:06,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580797597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:06,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:06,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:34:06,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888076347] [2021-08-21 12:34:06,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:34:06,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:34:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:34:06,728 INFO L87 Difference]: Start difference. First operand 1101 states and 2661 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:07,800 INFO L93 Difference]: Finished difference Result 2463 states and 6054 transitions. [2021-08-21 12:34:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:34:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:07,804 INFO L225 Difference]: With dead ends: 2463 [2021-08-21 12:34:07,804 INFO L226 Difference]: Without dead ends: 2454 [2021-08-21 12:34:07,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 719.1ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:34:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-08-21 12:34:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 1098. [2021-08-21 12:34:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.4193254329990883) internal successors, (2654), 1097 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2654 transitions. [2021-08-21 12:34:07,819 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2654 transitions. Word has length 29 [2021-08-21 12:34:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:07,819 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 2654 transitions. [2021-08-21 12:34:07,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2654 transitions. [2021-08-21 12:34:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:07,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:07,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:07,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 12:34:08,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:08,021 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:08,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:08,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2118211869, now seen corresponding path program 68 times [2021-08-21 12:34:08,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:08,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917657284] [2021-08-21 12:34:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:08,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:08,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:08,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917657284] [2021-08-21 12:34:08,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917657284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:08,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245482782] [2021-08-21 12:34:08,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:34:08,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:08,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:08,396 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:08,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:34:11,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:34:11,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:11,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:11,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:12,085 INFO L388 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 19 treesize of output 11 [2021-08-21 12:34:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:12,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245482782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:12,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:12,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:34:12,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621900314] [2021-08-21 12:34:12,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:34:12,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:12,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:34:12,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:34:12,177 INFO L87 Difference]: Start difference. First operand 1098 states and 2654 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:13,456 INFO L93 Difference]: Finished difference Result 2418 states and 5958 transitions. [2021-08-21 12:34:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:34:13,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:13,460 INFO L225 Difference]: With dead ends: 2418 [2021-08-21 12:34:13,460 INFO L226 Difference]: Without dead ends: 2399 [2021-08-21 12:34:13,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:34:13,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-08-21 12:34:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 1098. [2021-08-21 12:34:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.4193254329990883) internal successors, (2654), 1097 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2654 transitions. [2021-08-21 12:34:13,479 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2654 transitions. Word has length 29 [2021-08-21 12:34:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:13,479 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 2654 transitions. [2021-08-21 12:34:13,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2654 transitions. [2021-08-21 12:34:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:13,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:13,481 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:13,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 12:34:13,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:13,681 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2009019867, now seen corresponding path program 69 times [2021-08-21 12:34:13,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:13,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534298172] [2021-08-21 12:34:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:13,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:14,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:14,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534298172] [2021-08-21 12:34:14,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534298172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:14,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598743054] [2021-08-21 12:34:14,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:34:14,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:14,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:14,014 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:14,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:34:17,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:34:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:17,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:34:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:17,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:34:17,830 INFO L388 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 27 treesize of output 43 [2021-08-21 12:34:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:18,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598743054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:18,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:18,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-21 12:34:18,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982740639] [2021-08-21 12:34:18,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:34:18,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:34:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:34:18,480 INFO L87 Difference]: Start difference. First operand 1098 states and 2654 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:21,449 INFO L93 Difference]: Finished difference Result 2467 states and 6067 transitions. [2021-08-21 12:34:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:34:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:21,452 INFO L225 Difference]: With dead ends: 2467 [2021-08-21 12:34:21,452 INFO L226 Difference]: Without dead ends: 2445 [2021-08-21 12:34:21,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 2109.5ms TimeCoverageRelationStatistics Valid=408, Invalid=3132, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 12:34:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-08-21 12:34:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1108. [2021-08-21 12:34:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.4200542005420056) internal successors, (2679), 1107 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 2679 transitions. [2021-08-21 12:34:21,472 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 2679 transitions. Word has length 29 [2021-08-21 12:34:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:21,472 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 2679 transitions. [2021-08-21 12:34:21,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 2679 transitions. [2021-08-21 12:34:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:21,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:21,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:21,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:21,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:21,674 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1237881243, now seen corresponding path program 70 times [2021-08-21 12:34:21,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:21,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630591120] [2021-08-21 12:34:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:21,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:21,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:21,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630591120] [2021-08-21 12:34:21,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630591120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:21,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924670128] [2021-08-21 12:34:21,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:34:21,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:21,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:21,991 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:21,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:34:25,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:34:25,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:25,789 INFO L388 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 19 treesize of output 11 [2021-08-21 12:34:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924670128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:25,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:25,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 12:34:25,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551969024] [2021-08-21 12:34:25,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:34:25,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:25,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:34:25,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:34:25,871 INFO L87 Difference]: Start difference. First operand 1108 states and 2679 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:27,333 INFO L93 Difference]: Finished difference Result 2477 states and 6090 transitions. [2021-08-21 12:34:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:34:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:27,336 INFO L225 Difference]: With dead ends: 2477 [2021-08-21 12:34:27,337 INFO L226 Difference]: Without dead ends: 2467 [2021-08-21 12:34:27,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1032.5ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:34:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-08-21 12:34:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1100. [2021-08-21 12:34:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.4176524112829845) internal successors, (2657), 1099 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 2657 transitions. [2021-08-21 12:34:27,354 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 2657 transitions. Word has length 29 [2021-08-21 12:34:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:27,354 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 2657 transitions. [2021-08-21 12:34:27,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 2657 transitions. [2021-08-21 12:34:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:27,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:27,355 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:27,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 12:34:27,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 12:34:27,564 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1773824455, now seen corresponding path program 71 times [2021-08-21 12:34:27,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:27,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314760712] [2021-08-21 12:34:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:27,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:27,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:27,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314760712] [2021-08-21 12:34:27,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314760712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:27,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805527279] [2021-08-21 12:34:27,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:34:27,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:27,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:27,917 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:27,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:34:31,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:34:31,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:34:31,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:34:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:31,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805527279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:31,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:31,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:34:31,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865408081] [2021-08-21 12:34:31,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:34:31,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:31,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:34:31,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:34:31,840 INFO L87 Difference]: Start difference. First operand 1100 states and 2657 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:33,020 INFO L93 Difference]: Finished difference Result 2491 states and 6140 transitions. [2021-08-21 12:34:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:34:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:33,024 INFO L225 Difference]: With dead ends: 2491 [2021-08-21 12:34:33,024 INFO L226 Difference]: Without dead ends: 2473 [2021-08-21 12:34:33,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:34:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-08-21 12:34:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1064. [2021-08-21 12:34:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 2.412041392285983) internal successors, (2564), 1063 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 2564 transitions. [2021-08-21 12:34:33,039 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 2564 transitions. Word has length 29 [2021-08-21 12:34:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:33,039 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 2564 transitions. [2021-08-21 12:34:33,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 2564 transitions. [2021-08-21 12:34:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:33,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:33,040 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:33,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:33,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:33,243 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash 242889651, now seen corresponding path program 72 times [2021-08-21 12:34:33,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:33,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184105844] [2021-08-21 12:34:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:33,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:33,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:33,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184105844] [2021-08-21 12:34:33,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184105844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:33,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996080327] [2021-08-21 12:34:33,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:34:33,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:33,616 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:33,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:34:36,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:34:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:37,492 INFO L388 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 19 treesize of output 11 [2021-08-21 12:34:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:37,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996080327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:37,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:37,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 12:34:37,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569002880] [2021-08-21 12:34:37,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:34:37,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:37,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:34:37,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:34:37,560 INFO L87 Difference]: Start difference. First operand 1064 states and 2564 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:38,561 INFO L93 Difference]: Finished difference Result 2607 states and 6472 transitions. [2021-08-21 12:34:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:34:38,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:38,565 INFO L225 Difference]: With dead ends: 2607 [2021-08-21 12:34:38,565 INFO L226 Difference]: Without dead ends: 2598 [2021-08-21 12:34:38,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 690.6ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:34:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-08-21 12:34:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1087. [2021-08-21 12:34:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.4189686924493556) internal successors, (2627), 1086 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2627 transitions. [2021-08-21 12:34:38,583 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2627 transitions. Word has length 29 [2021-08-21 12:34:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 2627 transitions. [2021-08-21 12:34:38,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2627 transitions. [2021-08-21 12:34:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:38,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:38,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:38,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:38,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:38,785 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:38,786 INFO L82 PathProgramCache]: Analyzing trace with hash 516561389, now seen corresponding path program 73 times [2021-08-21 12:34:38,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:38,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133225943] [2021-08-21 12:34:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:38,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:39,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133225943] [2021-08-21 12:34:39,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133225943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197312879] [2021-08-21 12:34:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:34:39,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:39,158 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:39,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:34:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:34:43,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:34:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:43,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197312879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:43,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:43,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:34:43,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081957903] [2021-08-21 12:34:43,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:34:43,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:34:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:34:43,131 INFO L87 Difference]: Start difference. First operand 1087 states and 2627 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:34:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:43,951 INFO L93 Difference]: Finished difference Result 2612 states and 6502 transitions. [2021-08-21 12:34:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:34:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:34:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:43,955 INFO L225 Difference]: With dead ends: 2612 [2021-08-21 12:34:43,955 INFO L226 Difference]: Without dead ends: 2601 [2021-08-21 12:34:43,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 605.8ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:34:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-08-21 12:34:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 1099. [2021-08-21 12:34:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 2.4198542805100183) internal successors, (2657), 1098 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 2657 transitions. [2021-08-21 12:34:43,971 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 2657 transitions. Word has length 29 [2021-08-21 12:34:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:43,971 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 2657 transitions. [2021-08-21 12:34:43,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:34:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 2657 transitions. [2021-08-21 12:34:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:43,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:43,973 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:43,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 12:34:44,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-21 12:34:44,174 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1181764557, now seen corresponding path program 74 times [2021-08-21 12:34:44,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:44,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846795141] [2021-08-21 12:34:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:44,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:44,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:44,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846795141] [2021-08-21 12:34:44,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846795141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:44,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861278979] [2021-08-21 12:34:44,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:34:44,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:44,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:44,505 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:44,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:34:48,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:34:48,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:48,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:48,485 INFO L388 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 19 treesize of output 11 [2021-08-21 12:34:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:48,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861278979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:48,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:48,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:34:48,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139442195] [2021-08-21 12:34:48,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:34:48,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:48,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:34:48,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:34:48,574 INFO L87 Difference]: Start difference. First operand 1099 states and 2657 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:34:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:49,454 INFO L93 Difference]: Finished difference Result 2565 states and 6363 transitions. [2021-08-21 12:34:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:34:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:34:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:49,458 INFO L225 Difference]: With dead ends: 2565 [2021-08-21 12:34:49,458 INFO L226 Difference]: Without dead ends: 2545 [2021-08-21 12:34:49,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 564.2ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:34:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-08-21 12:34:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1078. [2021-08-21 12:34:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.4168987929433614) internal successors, (2603), 1077 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2603 transitions. [2021-08-21 12:34:49,473 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2603 transitions. Word has length 29 [2021-08-21 12:34:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:49,473 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 2603 transitions. [2021-08-21 12:34:49,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:34:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2603 transitions. [2021-08-21 12:34:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:49,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:49,474 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:49,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 12:34:49,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:34:49,675 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1875666015, now seen corresponding path program 75 times [2021-08-21 12:34:49,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:49,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664905948] [2021-08-21 12:34:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:49,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:50,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:50,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664905948] [2021-08-21 12:34:50,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664905948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:50,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723820674] [2021-08-21 12:34:50,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:34:50,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:50,071 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:50,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:34:53,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:34:53,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:53,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:34:54,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:34:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:54,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723820674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:54,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:54,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:34:54,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250302621] [2021-08-21 12:34:54,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:34:54,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:34:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:34:54,217 INFO L87 Difference]: Start difference. First operand 1078 states and 2603 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:55,662 INFO L93 Difference]: Finished difference Result 2625 states and 6515 transitions. [2021-08-21 12:34:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:34:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:34:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:55,665 INFO L225 Difference]: With dead ends: 2625 [2021-08-21 12:34:55,666 INFO L226 Difference]: Without dead ends: 2614 [2021-08-21 12:34:55,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:34:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-08-21 12:34:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 1105. [2021-08-21 12:34:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 2.421195652173913) internal successors, (2673), 1104 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2673 transitions. [2021-08-21 12:34:55,681 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2673 transitions. Word has length 29 [2021-08-21 12:34:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:55,681 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 2673 transitions. [2021-08-21 12:34:55,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2673 transitions. [2021-08-21 12:34:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:34:55,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:55,682 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:55,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:55,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:55,885 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -662900231, now seen corresponding path program 76 times [2021-08-21 12:34:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:55,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139140704] [2021-08-21 12:34:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:55,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:56,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:56,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139140704] [2021-08-21 12:34:56,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139140704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:56,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528837355] [2021-08-21 12:34:56,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:34:56,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:56,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:56,265 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:34:56,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:34:59,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:34:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:34:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:35:00,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:35:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:00,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528837355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:00,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:00,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:35:00,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065042709] [2021-08-21 12:35:00,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:35:00,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:35:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:35:00,477 INFO L87 Difference]: Start difference. First operand 1105 states and 2673 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:01,939 INFO L93 Difference]: Finished difference Result 2560 states and 6336 transitions. [2021-08-21 12:35:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:35:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:01,943 INFO L225 Difference]: With dead ends: 2560 [2021-08-21 12:35:01,943 INFO L226 Difference]: Without dead ends: 2539 [2021-08-21 12:35:01,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1028.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:35:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-08-21 12:35:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1081. [2021-08-21 12:35:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 2.4157407407407407) internal successors, (2609), 1080 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2609 transitions. [2021-08-21 12:35:01,957 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2609 transitions. Word has length 29 [2021-08-21 12:35:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:01,957 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2609 transitions. [2021-08-21 12:35:01,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2609 transitions. [2021-08-21 12:35:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:01,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:01,959 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:01,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 12:35:02,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:02,159 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:02,160 INFO L82 PathProgramCache]: Analyzing trace with hash 866053837, now seen corresponding path program 77 times [2021-08-21 12:35:02,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:02,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740589709] [2021-08-21 12:35:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:02,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:02,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:02,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740589709] [2021-08-21 12:35:02,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740589709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:02,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707660143] [2021-08-21 12:35:02,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:35:02,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:02,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:02,546 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:02,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:35:06,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:35:06,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:06,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:35:06,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:06,752 INFO L388 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 19 treesize of output 11 [2021-08-21 12:35:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:06,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707660143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:06,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:06,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:35:06,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279786652] [2021-08-21 12:35:06,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:35:06,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:35:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:35:06,826 INFO L87 Difference]: Start difference. First operand 1081 states and 2609 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:08,458 INFO L93 Difference]: Finished difference Result 2267 states and 5552 transitions. [2021-08-21 12:35:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:35:08,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:08,462 INFO L225 Difference]: With dead ends: 2267 [2021-08-21 12:35:08,462 INFO L226 Difference]: Without dead ends: 2244 [2021-08-21 12:35:08,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1171.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:35:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-08-21 12:35:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1065. [2021-08-21 12:35:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.412593984962406) internal successors, (2567), 1064 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2567 transitions. [2021-08-21 12:35:08,475 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2567 transitions. Word has length 29 [2021-08-21 12:35:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:08,476 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 2567 transitions. [2021-08-21 12:35:08,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2567 transitions. [2021-08-21 12:35:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:08,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:08,477 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:08,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 12:35:08,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:08,677 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash 368061235, now seen corresponding path program 78 times [2021-08-21 12:35:08,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:08,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354476033] [2021-08-21 12:35:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:08,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:09,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:09,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354476033] [2021-08-21 12:35:09,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354476033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:09,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34616734] [2021-08-21 12:35:09,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:35:09,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:09,072 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:09,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:35:12,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:35:12,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:12,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:35:12,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:13,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:35:13,368 INFO L388 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 45 [2021-08-21 12:35:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:14,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34616734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:14,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:14,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 12:35:14,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155410775] [2021-08-21 12:35:14,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:35:14,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:35:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:35:14,032 INFO L87 Difference]: Start difference. First operand 1065 states and 2567 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:15,905 INFO L93 Difference]: Finished difference Result 2623 states and 6508 transitions. [2021-08-21 12:35:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:35:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:15,909 INFO L225 Difference]: With dead ends: 2623 [2021-08-21 12:35:15,909 INFO L226 Difference]: Without dead ends: 2612 [2021-08-21 12:35:15,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1517.2ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:35:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-08-21 12:35:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1103. [2021-08-21 12:35:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 2.4201451905626135) internal successors, (2667), 1102 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 2667 transitions. [2021-08-21 12:35:15,924 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 2667 transitions. Word has length 29 [2021-08-21 12:35:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:15,924 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 2667 transitions. [2021-08-21 12:35:15,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 2667 transitions. [2021-08-21 12:35:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:15,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:15,926 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:15,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 12:35:16,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:16,126 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2124462285, now seen corresponding path program 79 times [2021-08-21 12:35:16,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:16,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605073093] [2021-08-21 12:35:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:16,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:16,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:16,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605073093] [2021-08-21 12:35:16,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605073093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:16,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877150141] [2021-08-21 12:35:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:35:16,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:16,452 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:16,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:35:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:20,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:35:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:20,807 INFO L388 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 19 treesize of output 11 [2021-08-21 12:35:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:20,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877150141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:20,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:20,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:35:20,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865527241] [2021-08-21 12:35:20,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:35:20,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:35:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:35:20,897 INFO L87 Difference]: Start difference. First operand 1103 states and 2667 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:22,023 INFO L93 Difference]: Finished difference Result 2720 states and 6709 transitions. [2021-08-21 12:35:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:35:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:22,027 INFO L225 Difference]: With dead ends: 2720 [2021-08-21 12:35:22,027 INFO L226 Difference]: Without dead ends: 2700 [2021-08-21 12:35:22,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 871.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:35:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-08-21 12:35:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 1093. [2021-08-21 12:35:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 2.4148351648351647) internal successors, (2637), 1092 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 2637 transitions. [2021-08-21 12:35:22,043 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 2637 transitions. Word has length 29 [2021-08-21 12:35:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:22,043 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 2637 transitions. [2021-08-21 12:35:22,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 2637 transitions. [2021-08-21 12:35:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:22,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:22,044 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:22,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:22,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:22,245 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 553122373, now seen corresponding path program 80 times [2021-08-21 12:35:22,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:22,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91075236] [2021-08-21 12:35:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:22,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:22,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:22,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91075236] [2021-08-21 12:35:22,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91075236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:22,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101963763] [2021-08-21 12:35:22,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:35:22,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:22,573 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:22,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:35:26,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:35:26,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:26,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:35:26,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:27,034 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 12:35:27,034 INFO L388 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 33 [2021-08-21 12:35:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:27,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101963763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:27,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:27,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-21 12:35:27,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430225687] [2021-08-21 12:35:27,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:35:27,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:27,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:35:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:35:27,350 INFO L87 Difference]: Start difference. First operand 1093 states and 2637 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:28,941 INFO L93 Difference]: Finished difference Result 2479 states and 6050 transitions. [2021-08-21 12:35:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:35:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:28,945 INFO L225 Difference]: With dead ends: 2479 [2021-08-21 12:35:28,945 INFO L226 Difference]: Without dead ends: 2459 [2021-08-21 12:35:28,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1212.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:35:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-08-21 12:35:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1078. [2021-08-21 12:35:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.4113277623026925) internal successors, (2597), 1077 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2597 transitions. [2021-08-21 12:35:28,960 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2597 transitions. Word has length 29 [2021-08-21 12:35:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:28,960 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 2597 transitions. [2021-08-21 12:35:28,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2597 transitions. [2021-08-21 12:35:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:28,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:28,962 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:28,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:29,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-21 12:35:29,181 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash -760122651, now seen corresponding path program 81 times [2021-08-21 12:35:29,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:29,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606114377] [2021-08-21 12:35:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:29,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:29,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:29,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606114377] [2021-08-21 12:35:29,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606114377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:29,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404822550] [2021-08-21 12:35:29,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:35:29,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:29,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:29,551 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:29,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:35:33,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:35:33,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:33,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:35:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:33,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:35:33,967 INFO L388 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 27 treesize of output 15 [2021-08-21 12:35:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:34,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404822550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:34,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:34,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:35:34,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582128549] [2021-08-21 12:35:34,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:35:34,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:34,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:35:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:35:34,042 INFO L87 Difference]: Start difference. First operand 1078 states and 2597 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:35,119 INFO L93 Difference]: Finished difference Result 2258 states and 5515 transitions. [2021-08-21 12:35:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:35:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:35,122 INFO L225 Difference]: With dead ends: 2258 [2021-08-21 12:35:35,122 INFO L226 Difference]: Without dead ends: 2248 [2021-08-21 12:35:35,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 783.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:35:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-08-21 12:35:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1072. [2021-08-21 12:35:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.411764705882353) internal successors, (2583), 1071 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 2583 transitions. [2021-08-21 12:35:35,136 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 2583 transitions. Word has length 29 [2021-08-21 12:35:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:35,136 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 2583 transitions. [2021-08-21 12:35:35,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 2583 transitions. [2021-08-21 12:35:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:35,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:35,138 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:35,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 12:35:35,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:35,338 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:35,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1706994761, now seen corresponding path program 82 times [2021-08-21 12:35:35,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:35,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712975523] [2021-08-21 12:35:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:35,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:35,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:35,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712975523] [2021-08-21 12:35:35,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712975523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:35,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644915628] [2021-08-21 12:35:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:35:35,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:35,700 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:35,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:35:39,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:35:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:35:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:40,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:35:40,169 INFO L388 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 27 treesize of output 15 [2021-08-21 12:35:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:40,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644915628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:40,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:40,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:35:40,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207461434] [2021-08-21 12:35:40,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:35:40,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:35:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:35:40,263 INFO L87 Difference]: Start difference. First operand 1072 states and 2583 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:41,734 INFO L93 Difference]: Finished difference Result 2391 states and 5890 transitions. [2021-08-21 12:35:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:35:41,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:41,737 INFO L225 Difference]: With dead ends: 2391 [2021-08-21 12:35:41,737 INFO L226 Difference]: Without dead ends: 2374 [2021-08-21 12:35:41,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1015.3ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:35:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-08-21 12:35:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 1085. [2021-08-21 12:35:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.415129151291513) internal successors, (2618), 1084 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2618 transitions. [2021-08-21 12:35:41,752 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2618 transitions. Word has length 29 [2021-08-21 12:35:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:41,752 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2618 transitions. [2021-08-21 12:35:41,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:41,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2618 transitions. [2021-08-21 12:35:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:41,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:41,753 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:41,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 12:35:41,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:41,954 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:41,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1980666499, now seen corresponding path program 83 times [2021-08-21 12:35:41,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:41,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072352184] [2021-08-21 12:35:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:41,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:42,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:42,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072352184] [2021-08-21 12:35:42,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072352184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:42,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475592966] [2021-08-21 12:35:42,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:35:42,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:42,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:42,319 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:42,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:35:46,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:35:46,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:46,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:35:46,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:46,833 INFO L388 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 19 treesize of output 11 [2021-08-21 12:35:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:46,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475592966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:46,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:46,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:35:46,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204506635] [2021-08-21 12:35:46,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:35:46,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:35:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:35:46,935 INFO L87 Difference]: Start difference. First operand 1085 states and 2618 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:48,507 INFO L93 Difference]: Finished difference Result 2918 states and 7221 transitions. [2021-08-21 12:35:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:35:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:48,512 INFO L225 Difference]: With dead ends: 2918 [2021-08-21 12:35:48,512 INFO L226 Difference]: Without dead ends: 2903 [2021-08-21 12:35:48,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1327.9ms TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:35:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-08-21 12:35:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 1094. [2021-08-21 12:35:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 2.416285452881976) internal successors, (2641), 1093 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 2641 transitions. [2021-08-21 12:35:48,533 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 2641 transitions. Word has length 29 [2021-08-21 12:35:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:48,533 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 2641 transitions. [2021-08-21 12:35:48,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 2641 transitions. [2021-08-21 12:35:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:48,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:48,534 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:48,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:48,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:48,737 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1649097629, now seen corresponding path program 84 times [2021-08-21 12:35:48,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:48,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281244827] [2021-08-21 12:35:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:48,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:49,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:49,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281244827] [2021-08-21 12:35:49,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281244827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:49,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437999891] [2021-08-21 12:35:49,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:35:49,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:49,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:49,135 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:35:53,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:35:53,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:53,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:35:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:53,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:35:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:35:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437999891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:53,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:53,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-08-21 12:35:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404222975] [2021-08-21 12:35:53,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:35:53,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:35:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:35:53,731 INFO L87 Difference]: Start difference. First operand 1094 states and 2641 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:55,018 INFO L93 Difference]: Finished difference Result 2405 states and 5932 transitions. [2021-08-21 12:35:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:35:55,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:35:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:55,022 INFO L225 Difference]: With dead ends: 2405 [2021-08-21 12:35:55,022 INFO L226 Difference]: Without dead ends: 2386 [2021-08-21 12:35:55,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 943.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:35:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-08-21 12:35:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1076. [2021-08-21 12:35:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 2.4139534883720932) internal successors, (2595), 1075 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 2595 transitions. [2021-08-21 12:35:55,036 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 2595 transitions. Word has length 29 [2021-08-21 12:35:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:55,036 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 2595 transitions. [2021-08-21 12:35:55,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 2595 transitions. [2021-08-21 12:35:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:35:55,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:55,037 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:55,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 12:35:55,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:55,238 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:55,238 INFO L82 PathProgramCache]: Analyzing trace with hash -748677453, now seen corresponding path program 85 times [2021-08-21 12:35:55,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:55,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588330262] [2021-08-21 12:35:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:55,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:55,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:55,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588330262] [2021-08-21 12:35:55,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588330262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:55,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418328727] [2021-08-21 12:35:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:35:55,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:55,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:55,600 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:35:55,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:35:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:35:59,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:06,550 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 12:36:06,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 62 [2021-08-21 12:36:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418328727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:06,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:06,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:36:06,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608463256] [2021-08-21 12:36:06,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:36:06,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:36:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=290, Unknown=2, NotChecked=0, Total=380 [2021-08-21 12:36:06,683 INFO L87 Difference]: Start difference. First operand 1076 states and 2595 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:37:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:33,161 INFO L93 Difference]: Finished difference Result 3227 states and 8073 transitions. [2021-08-21 12:37:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:37:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:37:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:33,166 INFO L225 Difference]: With dead ends: 3227 [2021-08-21 12:37:33,166 INFO L226 Difference]: Without dead ends: 3214 [2021-08-21 12:37:33,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 16922.2ms TimeCoverageRelationStatistics Valid=327, Invalid=1308, Unknown=5, NotChecked=0, Total=1640 [2021-08-21 12:37:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-08-21 12:37:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1091. [2021-08-21 12:37:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 2.4174311926605503) internal successors, (2635), 1090 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 2635 transitions. [2021-08-21 12:37:33,185 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 2635 transitions. Word has length 29 [2021-08-21 12:37:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:33,185 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 2635 transitions. [2021-08-21 12:37:33,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:37:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 2635 transitions. [2021-08-21 12:37:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:37:33,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:33,186 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:33,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 12:37:33,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:33,387 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:33,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1007723597, now seen corresponding path program 86 times [2021-08-21 12:37:33,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:33,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445554765] [2021-08-21 12:37:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:33,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:33,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:33,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445554765] [2021-08-21 12:37:33,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445554765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:33,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983099575] [2021-08-21 12:37:33,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:37:33,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:33,898 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:37:33,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:37:38,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:37:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:37:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:37:38,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:37:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:38,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983099575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:38,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:38,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-21 12:37:38,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858584864] [2021-08-21 12:37:38,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:37:38,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:37:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:37:38,729 INFO L87 Difference]: Start difference. First operand 1091 states and 2635 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:37:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:40,663 INFO L93 Difference]: Finished difference Result 2619 states and 6520 transitions. [2021-08-21 12:37:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:37:40,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 29 [2021-08-21 12:37:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:40,667 INFO L225 Difference]: With dead ends: 2619 [2021-08-21 12:37:40,667 INFO L226 Difference]: Without dead ends: 2602 [2021-08-21 12:37:40,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1493.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:37:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-08-21 12:37:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1067. [2021-08-21 12:37:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.4127579737335836) internal successors, (2572), 1066 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2572 transitions. [2021-08-21 12:37:40,682 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 2572 transitions. Word has length 29 [2021-08-21 12:37:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:40,682 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 2572 transitions. [2021-08-21 12:37:40,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-21 12:37:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 2572 transitions. [2021-08-21 12:37:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:37:40,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:40,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:40,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:40,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-21 12:37:40,884 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:40,884 INFO L82 PathProgramCache]: Analyzing trace with hash -620595619, now seen corresponding path program 87 times [2021-08-21 12:37:40,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:40,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729237686] [2021-08-21 12:37:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:40,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:41,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:41,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729237686] [2021-08-21 12:37:41,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729237686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:41,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289049140] [2021-08-21 12:37:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:37:41,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:41,335 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:37:41,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:37:45,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:37:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:37:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:46,075 INFO L388 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 19 treesize of output 11 [2021-08-21 12:37:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:46,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289049140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:46,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:46,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 12:37:46,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660509602] [2021-08-21 12:37:46,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:37:46,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:46,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:37:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:37:46,175 INFO L87 Difference]: Start difference. First operand 1067 states and 2572 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:48,076 INFO L93 Difference]: Finished difference Result 2401 states and 5918 transitions. [2021-08-21 12:37:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:37:48,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:37:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:48,079 INFO L225 Difference]: With dead ends: 2401 [2021-08-21 12:37:48,079 INFO L226 Difference]: Without dead ends: 2391 [2021-08-21 12:37:48,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1096.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:37:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-21 12:37:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1051. [2021-08-21 12:37:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.4085714285714284) internal successors, (2529), 1050 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2529 transitions. [2021-08-21 12:37:48,106 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2529 transitions. Word has length 29 [2021-08-21 12:37:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:48,106 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 2529 transitions. [2021-08-21 12:37:48,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2529 transitions. [2021-08-21 12:37:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:37:48,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:48,107 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:48,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 12:37:48,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:48,329 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1362607347, now seen corresponding path program 88 times [2021-08-21 12:37:48,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:48,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174446452] [2021-08-21 12:37:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:48,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:48,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:48,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174446452] [2021-08-21 12:37:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174446452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:48,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164407997] [2021-08-21 12:37:48,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:37:48,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:48,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:48,770 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:37:48,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:37:53,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:37:53,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:37:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:53,687 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 12:37:53,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-08-21 12:37:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:53,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164407997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:53,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:53,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:37:53,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561249460] [2021-08-21 12:37:53,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:37:53,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:53,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:37:53,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:37:53,773 INFO L87 Difference]: Start difference. First operand 1051 states and 2529 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:55,888 INFO L93 Difference]: Finished difference Result 2563 states and 6277 transitions. [2021-08-21 12:37:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:37:55,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:37:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:55,892 INFO L225 Difference]: With dead ends: 2563 [2021-08-21 12:37:55,892 INFO L226 Difference]: Without dead ends: 2546 [2021-08-21 12:37:55,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1509.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:37:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-08-21 12:37:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1069. [2021-08-21 12:37:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.411985018726592) internal successors, (2576), 1068 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 2576 transitions. [2021-08-21 12:37:55,906 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 2576 transitions. Word has length 29 [2021-08-21 12:37:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:55,906 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 2576 transitions. [2021-08-21 12:37:55,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 2576 transitions. [2021-08-21 12:37:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:37:55,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:55,908 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:55,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 12:37:56,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:56,108 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1636279085, now seen corresponding path program 89 times [2021-08-21 12:37:56,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:56,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928007578] [2021-08-21 12:37:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:56,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:56,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:56,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928007578] [2021-08-21 12:37:56,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928007578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:56,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820885129] [2021-08-21 12:37:56,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:37:56,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:56,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:56,591 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:37:56,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:38:00,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:38:00,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:00,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:38:00,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:38:01,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:38:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:01,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820885129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:01,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:01,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:38:01,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832730760] [2021-08-21 12:38:01,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:38:01,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:01,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:38:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:38:01,578 INFO L87 Difference]: Start difference. First operand 1069 states and 2576 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:04,107 INFO L93 Difference]: Finished difference Result 3028 states and 7493 transitions. [2021-08-21 12:38:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:38:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:38:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:04,111 INFO L225 Difference]: With dead ends: 3028 [2021-08-21 12:38:04,111 INFO L226 Difference]: Without dead ends: 3015 [2021-08-21 12:38:04,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2172.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1882, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:38:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-08-21 12:38:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 1085. [2021-08-21 12:38:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.4142066420664205) internal successors, (2617), 1084 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2617 transitions. [2021-08-21 12:38:04,127 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2617 transitions. Word has length 29 [2021-08-21 12:38:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:04,127 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2617 transitions. [2021-08-21 12:38:04,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2617 transitions. [2021-08-21 12:38:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:38:04,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:04,129 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:04,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:04,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:04,330 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1993485043, now seen corresponding path program 90 times [2021-08-21 12:38:04,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:04,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670811934] [2021-08-21 12:38:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:04,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:04,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:04,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670811934] [2021-08-21 12:38:04,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670811934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:04,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217478990] [2021-08-21 12:38:04,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:38:04,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:04,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:04,827 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:04,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:38:09,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:38:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:09,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:38:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:10,198 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 12:38:10,199 INFO L388 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 37 [2021-08-21 12:38:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:10,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217478990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:10,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:10,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-21 12:38:10,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535117201] [2021-08-21 12:38:10,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:38:10,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:38:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:38:10,725 INFO L87 Difference]: Start difference. First operand 1085 states and 2617 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:12,772 INFO L93 Difference]: Finished difference Result 2409 states and 5939 transitions. [2021-08-21 12:38:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:38:12,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:38:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:12,776 INFO L225 Difference]: With dead ends: 2409 [2021-08-21 12:38:12,776 INFO L226 Difference]: Without dead ends: 2391 [2021-08-21 12:38:12,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1390.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:38:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-21 12:38:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1054. [2021-08-21 12:38:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.4083570750237415) internal successors, (2536), 1053 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 2536 transitions. [2021-08-21 12:38:12,790 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 2536 transitions. Word has length 29 [2021-08-21 12:38:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:12,790 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 2536 transitions. [2021-08-21 12:38:12,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 2536 transitions. [2021-08-21 12:38:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:38:12,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:12,792 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:12,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:12,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:12,993 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1050719043, now seen corresponding path program 91 times [2021-08-21 12:38:12,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:12,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056022856] [2021-08-21 12:38:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:12,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:13,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:13,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056022856] [2021-08-21 12:38:13,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056022856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:13,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381933057] [2021-08-21 12:38:13,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:38:13,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:13,497 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:13,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:38:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:38:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:38:18,660 INFO L388 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 27 treesize of output 15 [2021-08-21 12:38:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:18,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381933057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:18,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:18,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-08-21 12:38:18,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989019232] [2021-08-21 12:38:18,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:38:18,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:38:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:38:18,745 INFO L87 Difference]: Start difference. First operand 1054 states and 2536 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:19,974 INFO L93 Difference]: Finished difference Result 2373 states and 5828 transitions. [2021-08-21 12:38:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:38:19,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:38:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:19,978 INFO L225 Difference]: With dead ends: 2373 [2021-08-21 12:38:19,978 INFO L226 Difference]: Without dead ends: 2364 [2021-08-21 12:38:19,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 962.1ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:38:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-08-21 12:38:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1048. [2021-08-21 12:38:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.408787010506208) internal successors, (2522), 1047 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2522 transitions. [2021-08-21 12:38:19,993 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2522 transitions. Word has length 29 [2021-08-21 12:38:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:19,993 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 2522 transitions. [2021-08-21 12:38:19,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2522 transitions. [2021-08-21 12:38:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:38:19,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:19,994 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:20,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:20,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:20,195 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash 570757232, now seen corresponding path program 1 times [2021-08-21 12:38:20,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:20,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974276238] [2021-08-21 12:38:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:20,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:20,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:20,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974276238] [2021-08-21 12:38:20,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974276238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:20,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131546035] [2021-08-21 12:38:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:20,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:20,725 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:20,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:38:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:25,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:25,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:25,832 INFO L388 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 29 treesize of output 17 [2021-08-21 12:38:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:25,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131546035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:25,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:25,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:38:25,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470624666] [2021-08-21 12:38:25,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:38:25,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:38:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:38:25,907 INFO L87 Difference]: Start difference. First operand 1048 states and 2522 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:27,383 INFO L93 Difference]: Finished difference Result 2363 states and 5761 transitions. [2021-08-21 12:38:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:38:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:38:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:27,387 INFO L225 Difference]: With dead ends: 2363 [2021-08-21 12:38:27,387 INFO L226 Difference]: Without dead ends: 2353 [2021-08-21 12:38:27,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 955.9ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:38:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-08-21 12:38:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1051. [2021-08-21 12:38:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.4066666666666667) internal successors, (2527), 1050 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2527 transitions. [2021-08-21 12:38:27,400 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2527 transitions. Word has length 30 [2021-08-21 12:38:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:27,401 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 2527 transitions. [2021-08-21 12:38:27,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2527 transitions. [2021-08-21 12:38:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:38:27,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:27,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:27,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:27,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-21 12:38:27,602 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash 238679972, now seen corresponding path program 2 times [2021-08-21 12:38:27,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:27,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008006554] [2021-08-21 12:38:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:27,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:28,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:28,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008006554] [2021-08-21 12:38:28,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008006554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:28,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885616292] [2021-08-21 12:38:28,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:38:28,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:28,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:28,123 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:28,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:38:32,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:38:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:32,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:33,269 INFO L388 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 29 treesize of output 17 [2021-08-21 12:38:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:33,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885616292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:33,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:33,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-08-21 12:38:33,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73543395] [2021-08-21 12:38:33,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:38:33,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:38:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:38:33,366 INFO L87 Difference]: Start difference. First operand 1051 states and 2527 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:35,175 INFO L93 Difference]: Finished difference Result 2638 states and 6476 transitions. [2021-08-21 12:38:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:38:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:38:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:35,179 INFO L225 Difference]: With dead ends: 2638 [2021-08-21 12:38:35,179 INFO L226 Difference]: Without dead ends: 2627 [2021-08-21 12:38:35,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1250.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:38:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-08-21 12:38:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 1090. [2021-08-21 12:38:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 2.4132231404958677) internal successors, (2628), 1089 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 2628 transitions. [2021-08-21 12:38:35,194 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 2628 transitions. Word has length 30 [2021-08-21 12:38:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:35,195 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 2628 transitions. [2021-08-21 12:38:35,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 2628 transitions. [2021-08-21 12:38:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:38:35,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:35,196 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:35,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:35,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 12:38:35,396 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:35,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1995081022, now seen corresponding path program 3 times [2021-08-21 12:38:35,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:35,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405355064] [2021-08-21 12:38:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:35,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:36,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:36,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405355064] [2021-08-21 12:38:36,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405355064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:36,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247132682] [2021-08-21 12:38:36,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:38:36,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:36,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:36,141 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:36,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:38:40,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:38:40,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:40,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:38:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:41,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:38:41,477 INFO L388 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 28 treesize of output 44 [2021-08-21 12:38:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:42,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247132682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:42,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-21 12:38:42,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264002267] [2021-08-21 12:38:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:38:42,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:38:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:38:42,118 INFO L87 Difference]: Start difference. First operand 1090 states and 2628 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:38:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:45,197 INFO L93 Difference]: Finished difference Result 2559 states and 6318 transitions. [2021-08-21 12:38:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:38:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-08-21 12:38:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:45,201 INFO L225 Difference]: With dead ends: 2559 [2021-08-21 12:38:45,201 INFO L226 Difference]: Without dead ends: 2546 [2021-08-21 12:38:45,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2588.7ms TimeCoverageRelationStatistics Valid=456, Invalid=2094, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:38:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-08-21 12:38:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1086. [2021-08-21 12:38:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.4119815668202764) internal successors, (2617), 1085 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2617 transitions. [2021-08-21 12:38:45,216 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2617 transitions. Word has length 30 [2021-08-21 12:38:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:45,216 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2617 transitions. [2021-08-21 12:38:45,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:38:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2617 transitions. [2021-08-21 12:38:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:38:45,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:45,218 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:45,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 12:38:45,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:45,431 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:45,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1077130832, now seen corresponding path program 4 times [2021-08-21 12:38:45,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:45,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169777681] [2021-08-21 12:38:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:45,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:46,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:46,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169777681] [2021-08-21 12:38:46,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169777681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:46,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154365450] [2021-08-21 12:38:46,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:38:46,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:46,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:46,037 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:46,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:38:50,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:38:50,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:50,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:50,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:51,320 INFO L388 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 29 treesize of output 17 [2021-08-21 12:38:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:51,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154365450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:51,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:51,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:38:51,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400999188] [2021-08-21 12:38:51,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:38:51,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:38:51,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:38:51,459 INFO L87 Difference]: Start difference. First operand 1086 states and 2617 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:53,846 INFO L93 Difference]: Finished difference Result 3008 states and 7390 transitions. [2021-08-21 12:38:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:38:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:38:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:53,851 INFO L225 Difference]: With dead ends: 3008 [2021-08-21 12:38:53,851 INFO L226 Difference]: Without dead ends: 2990 [2021-08-21 12:38:53,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1790.9ms TimeCoverageRelationStatistics Valid=436, Invalid=1726, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:38:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-08-21 12:38:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 1074. [2021-08-21 12:38:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.409133271202237) internal successors, (2585), 1073 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2585 transitions. [2021-08-21 12:38:53,868 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2585 transitions. Word has length 30 [2021-08-21 12:38:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:53,868 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 2585 transitions. [2021-08-21 12:38:53,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2585 transitions. [2021-08-21 12:38:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:38:53,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:53,869 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:53,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:54,070 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:38:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1764442066, now seen corresponding path program 5 times [2021-08-21 12:38:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:54,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324012815] [2021-08-21 12:38:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:54,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:54,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:54,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324012815] [2021-08-21 12:38:54,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324012815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:54,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396377323] [2021-08-21 12:38:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:38:54,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:54,624 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:38:54,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:38:59,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:38:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:59,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:38:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:00,006 INFO L388 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 29 treesize of output 17 [2021-08-21 12:39:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:00,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396377323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:00,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:00,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:39:00,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966194708] [2021-08-21 12:39:00,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:39:00,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:39:00,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:00,082 INFO L87 Difference]: Start difference. First operand 1074 states and 2585 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:01,840 INFO L93 Difference]: Finished difference Result 2426 states and 5898 transitions. [2021-08-21 12:39:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:39:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:01,844 INFO L225 Difference]: With dead ends: 2426 [2021-08-21 12:39:01,844 INFO L226 Difference]: Without dead ends: 2406 [2021-08-21 12:39:01,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1140.3ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:39:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-08-21 12:39:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1072. [2021-08-21 12:39:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.4089635854341735) internal successors, (2580), 1071 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 2580 transitions. [2021-08-21 12:39:01,859 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 2580 transitions. Word has length 30 [2021-08-21 12:39:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 2580 transitions. [2021-08-21 12:39:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 2580 transitions. [2021-08-21 12:39:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:01,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:01,860 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:01,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:02,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 12:39:02,061 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash 892952774, now seen corresponding path program 6 times [2021-08-21 12:39:02,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:02,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095858217] [2021-08-21 12:39:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:02,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:02,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:02,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095858217] [2021-08-21 12:39:02,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095858217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:02,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980159278] [2021-08-21 12:39:02,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:39:02,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:02,626 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:02,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:39:07,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:39:07,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:07,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:39:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:08,093 INFO L388 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 29 treesize of output 17 [2021-08-21 12:39:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:08,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980159278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:08,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:08,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:39:08,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612926107] [2021-08-21 12:39:08,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:39:08,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:39:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:08,172 INFO L87 Difference]: Start difference. First operand 1072 states and 2580 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:10,013 INFO L93 Difference]: Finished difference Result 2519 states and 6113 transitions. [2021-08-21 12:39:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:39:10,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:10,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:10,017 INFO L225 Difference]: With dead ends: 2519 [2021-08-21 12:39:10,017 INFO L226 Difference]: Without dead ends: 2482 [2021-08-21 12:39:10,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1215.5ms TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:39:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-08-21 12:39:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1066. [2021-08-21 12:39:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 2.408450704225352) internal successors, (2565), 1065 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 2565 transitions. [2021-08-21 12:39:10,031 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 2565 transitions. Word has length 30 [2021-08-21 12:39:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:10,032 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 2565 transitions. [2021-08-21 12:39:10,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 2565 transitions. [2021-08-21 12:39:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:10,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:10,033 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:10,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 12:39:10,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:10,234 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:10,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:10,234 INFO L82 PathProgramCache]: Analyzing trace with hash -740451580, now seen corresponding path program 7 times [2021-08-21 12:39:10,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:10,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117447574] [2021-08-21 12:39:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:10,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:10,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:10,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117447574] [2021-08-21 12:39:10,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117447574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:10,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053840387] [2021-08-21 12:39:10,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:39:10,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:10,813 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:10,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:39:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:15,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:39:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:16,251 INFO L388 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 29 treesize of output 17 [2021-08-21 12:39:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:16,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053840387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:16,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:16,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:39:16,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311297326] [2021-08-21 12:39:16,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:39:16,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:16,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:39:16,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:39:16,327 INFO L87 Difference]: Start difference. First operand 1066 states and 2565 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:17,821 INFO L93 Difference]: Finished difference Result 2328 states and 5682 transitions. [2021-08-21 12:39:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:39:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:17,825 INFO L225 Difference]: With dead ends: 2328 [2021-08-21 12:39:17,825 INFO L226 Difference]: Without dead ends: 2318 [2021-08-21 12:39:17,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 956.5ms TimeCoverageRelationStatistics Valid=218, Invalid=838, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:39:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-08-21 12:39:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1066. [2021-08-21 12:39:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 2.408450704225352) internal successors, (2565), 1065 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 2565 transitions. [2021-08-21 12:39:17,838 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 2565 transitions. Word has length 30 [2021-08-21 12:39:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:17,839 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 2565 transitions. [2021-08-21 12:39:17,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 2565 transitions. [2021-08-21 12:39:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:17,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:17,840 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:17,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 12:39:18,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:18,040 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:18,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1900961628, now seen corresponding path program 8 times [2021-08-21 12:39:18,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:18,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109292695] [2021-08-21 12:39:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:18,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:18,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:18,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109292695] [2021-08-21 12:39:18,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109292695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:18,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692218203] [2021-08-21 12:39:18,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:39:18,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:18,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:18,620 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:18,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:39:23,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:39:23,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:23,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:39:23,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:24,255 INFO L388 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 28 treesize of output 16 [2021-08-21 12:39:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:24,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692218203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:24,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:24,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-08-21 12:39:24,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749015871] [2021-08-21 12:39:24,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:39:24,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:39:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:39:24,332 INFO L87 Difference]: Start difference. First operand 1066 states and 2565 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:26,727 INFO L93 Difference]: Finished difference Result 2395 states and 5892 transitions. [2021-08-21 12:39:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:39:26,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:26,731 INFO L225 Difference]: With dead ends: 2395 [2021-08-21 12:39:26,731 INFO L226 Difference]: Without dead ends: 2386 [2021-08-21 12:39:26,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1546.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:39:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-08-21 12:39:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1090. [2021-08-21 12:39:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 2.4123048668503215) internal successors, (2627), 1089 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 2627 transitions. [2021-08-21 12:39:26,745 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 2627 transitions. Word has length 30 [2021-08-21 12:39:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:26,745 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 2627 transitions. [2021-08-21 12:39:26,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 2627 transitions. [2021-08-21 12:39:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:26,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:26,747 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:26,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:39:26,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:39:26,947 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1773518532, now seen corresponding path program 9 times [2021-08-21 12:39:26,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:26,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241203287] [2021-08-21 12:39:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:26,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:27,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:27,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241203287] [2021-08-21 12:39:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241203287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:27,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600027006] [2021-08-21 12:39:27,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:27,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:27,496 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:27,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:39:32,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:39:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:32,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:39:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:33,129 INFO L388 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 29 treesize of output 17 [2021-08-21 12:39:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:33,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600027006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:33,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:33,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-08-21 12:39:33,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390956148] [2021-08-21 12:39:33,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:39:33,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:39:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:39:33,226 INFO L87 Difference]: Start difference. First operand 1090 states and 2627 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:35,351 INFO L93 Difference]: Finished difference Result 2422 states and 5967 transitions. [2021-08-21 12:39:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:39:35,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:35,355 INFO L225 Difference]: With dead ends: 2422 [2021-08-21 12:39:35,355 INFO L226 Difference]: Without dead ends: 2411 [2021-08-21 12:39:35,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1471.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:39:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-08-21 12:39:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1102. [2021-08-21 12:39:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 2.413260672116258) internal successors, (2657), 1101 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 2657 transitions. [2021-08-21 12:39:35,370 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 2657 transitions. Word has length 30 [2021-08-21 12:39:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:35,370 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 2657 transitions. [2021-08-21 12:39:35,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 2657 transitions. [2021-08-21 12:39:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:35,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:35,372 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:35,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:35,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:39:35,573 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1856245596, now seen corresponding path program 10 times [2021-08-21 12:39:35,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:35,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734135355] [2021-08-21 12:39:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:35,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:36,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:36,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734135355] [2021-08-21 12:39:36,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734135355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:36,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819486977] [2021-08-21 12:39:36,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:36,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:36,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:36,137 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:36,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:39:41,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:41,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:41,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:39:41,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:41,756 INFO L388 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 29 treesize of output 17 [2021-08-21 12:39:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:41,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819486977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:41,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:41,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-08-21 12:39:41,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122834816] [2021-08-21 12:39:41,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:39:41,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:41,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:39:41,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:39:41,845 INFO L87 Difference]: Start difference. First operand 1102 states and 2657 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:44,069 INFO L93 Difference]: Finished difference Result 2507 states and 6186 transitions. [2021-08-21 12:39:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:39:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:44,073 INFO L225 Difference]: With dead ends: 2507 [2021-08-21 12:39:44,073 INFO L226 Difference]: Without dead ends: 2487 [2021-08-21 12:39:44,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1597.9ms TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:39:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-08-21 12:39:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1081. [2021-08-21 12:39:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 2.410185185185185) internal successors, (2603), 1080 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2603 transitions. [2021-08-21 12:39:44,088 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2603 transitions. Word has length 30 [2021-08-21 12:39:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:44,088 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2603 transitions. [2021-08-21 12:39:44,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2603 transitions. [2021-08-21 12:39:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:44,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:44,090 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:44,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:44,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:44,290 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:44,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1433916058, now seen corresponding path program 11 times [2021-08-21 12:39:44,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:44,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306236684] [2021-08-21 12:39:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:44,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:44,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:44,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306236684] [2021-08-21 12:39:44,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306236684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:44,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969351548] [2021-08-21 12:39:44,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:39:44,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:44,918 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:44,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:39:49,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:39:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:49,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:39:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:50,594 INFO L388 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 29 treesize of output 17 [2021-08-21 12:39:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:50,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969351548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:50,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:50,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-08-21 12:39:50,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104891633] [2021-08-21 12:39:50,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:39:50,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:39:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:39:50,695 INFO L87 Difference]: Start difference. First operand 1081 states and 2603 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:52,810 INFO L93 Difference]: Finished difference Result 2472 states and 6072 transitions. [2021-08-21 12:39:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:39:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:39:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:52,814 INFO L225 Difference]: With dead ends: 2472 [2021-08-21 12:39:52,814 INFO L226 Difference]: Without dead ends: 2461 [2021-08-21 12:39:52,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1701.8ms TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:39:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-08-21 12:39:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1096. [2021-08-21 12:39:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.410958904109589) internal successors, (2640), 1095 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 2640 transitions. [2021-08-21 12:39:52,829 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 2640 transitions. Word has length 30 [2021-08-21 12:39:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:52,829 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 2640 transitions. [2021-08-21 12:39:52,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 2640 transitions. [2021-08-21 12:39:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:39:52,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:52,830 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:52,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:53,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:53,031 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:39:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:53,031 INFO L82 PathProgramCache]: Analyzing trace with hash 322484992, now seen corresponding path program 12 times [2021-08-21 12:39:53,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:53,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987816881] [2021-08-21 12:39:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:53,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:53,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:53,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987816881] [2021-08-21 12:39:53,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987816881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:53,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52586604] [2021-08-21 12:39:53,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:39:53,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:53,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:53,616 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:39:53,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:39:58,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:39:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:58,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:39:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:59,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:39:59,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-08-21 12:39:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:59,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52586604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:59,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:39:59,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277260630] [2021-08-21 12:39:59,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:39:59,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:39:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:39:59,784 INFO L87 Difference]: Start difference. First operand 1096 states and 2640 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:02,901 INFO L93 Difference]: Finished difference Result 2633 states and 6492 transitions. [2021-08-21 12:40:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:40:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:40:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:02,905 INFO L225 Difference]: With dead ends: 2633 [2021-08-21 12:40:02,905 INFO L226 Difference]: Without dead ends: 2621 [2021-08-21 12:40:02,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2496.6ms TimeCoverageRelationStatistics Valid=536, Invalid=2434, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:40:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2021-08-21 12:40:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 1117. [2021-08-21 12:40:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.413978494623656) internal successors, (2694), 1116 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 2694 transitions. [2021-08-21 12:40:02,919 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 2694 transitions. Word has length 30 [2021-08-21 12:40:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:02,919 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 2694 transitions. [2021-08-21 12:40:02,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 2694 transitions. [2021-08-21 12:40:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:40:02,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:02,921 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:02,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 12:40:03,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 12:40:03,121 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash -595465198, now seen corresponding path program 13 times [2021-08-21 12:40:03,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:03,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133475411] [2021-08-21 12:40:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:03,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:03,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:03,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133475411] [2021-08-21 12:40:03,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133475411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:03,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071368018] [2021-08-21 12:40:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:40:03,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:03,682 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:03,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:40:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:08,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:40:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:09,546 INFO L388 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 29 treesize of output 17 [2021-08-21 12:40:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:09,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071368018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:09,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:09,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:40:09,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98357292] [2021-08-21 12:40:09,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:40:09,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:40:09,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:40:09,662 INFO L87 Difference]: Start difference. First operand 1117 states and 2694 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:12,896 INFO L93 Difference]: Finished difference Result 2952 states and 7219 transitions. [2021-08-21 12:40:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:40:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:40:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:12,900 INFO L225 Difference]: With dead ends: 2952 [2021-08-21 12:40:12,900 INFO L226 Difference]: Without dead ends: 2930 [2021-08-21 12:40:12,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2668.4ms TimeCoverageRelationStatistics Valid=695, Invalid=3211, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:40:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-08-21 12:40:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1084. [2021-08-21 12:40:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.4090489381348106) internal successors, (2609), 1083 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2609 transitions. [2021-08-21 12:40:12,915 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2609 transitions. Word has length 30 [2021-08-21 12:40:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:12,915 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 2609 transitions. [2021-08-21 12:40:12,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2609 transitions. [2021-08-21 12:40:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:40:12,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:12,917 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:12,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:13,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 12:40:13,117 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash 857929200, now seen corresponding path program 14 times [2021-08-21 12:40:13,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:13,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291649155] [2021-08-21 12:40:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:13,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:13,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:13,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291649155] [2021-08-21 12:40:13,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291649155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:13,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181326416] [2021-08-21 12:40:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:40:13,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:13,642 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:13,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:40:18,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:40:18,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:18,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:40:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:19,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:40:19,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-08-21 12:40:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:19,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181326416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:19,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:19,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-21 12:40:19,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036576945] [2021-08-21 12:40:19,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:40:19,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:19,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:40:19,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:40:19,970 INFO L87 Difference]: Start difference. First operand 1084 states and 2609 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:40:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:23,919 INFO L93 Difference]: Finished difference Result 2607 states and 6349 transitions. [2021-08-21 12:40:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:40:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-08-21 12:40:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:23,923 INFO L225 Difference]: With dead ends: 2607 [2021-08-21 12:40:23,923 INFO L226 Difference]: Without dead ends: 2587 [2021-08-21 12:40:23,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 3018.2ms TimeCoverageRelationStatistics Valid=691, Invalid=2969, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 12:40:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-08-21 12:40:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1094. [2021-08-21 12:40:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 2.411710887465691) internal successors, (2636), 1093 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 2636 transitions. [2021-08-21 12:40:23,941 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 2636 transitions. Word has length 30 [2021-08-21 12:40:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:23,941 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 2636 transitions. [2021-08-21 12:40:23,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:40:23,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 2636 transitions. [2021-08-21 12:40:23,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:40:23,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:23,942 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:23,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 12:40:24,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:24,143 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash -406049408, now seen corresponding path program 15 times [2021-08-21 12:40:24,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:24,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201736916] [2021-08-21 12:40:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:24,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:24,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:24,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201736916] [2021-08-21 12:40:24,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201736916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:24,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133846043] [2021-08-21 12:40:24,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:40:24,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:24,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:24,678 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:24,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:40:30,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:40:30,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:30,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:40:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:30,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:40:30,706 INFO L388 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 28 treesize of output 44 [2021-08-21 12:40:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133846043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:31,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-21 12:40:31,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940925856] [2021-08-21 12:40:31,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:40:31,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:31,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:40:31,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:40:31,313 INFO L87 Difference]: Start difference. First operand 1094 states and 2636 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:40:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:35,380 INFO L93 Difference]: Finished difference Result 2480 states and 6061 transitions. [2021-08-21 12:40:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:40:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-08-21 12:40:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:35,384 INFO L225 Difference]: With dead ends: 2480 [2021-08-21 12:40:35,384 INFO L226 Difference]: Without dead ends: 2469 [2021-08-21 12:40:35,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3397.8ms TimeCoverageRelationStatistics Valid=543, Invalid=2997, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 12:40:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-08-21 12:40:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1118. [2021-08-21 12:40:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 2.4136078782453) internal successors, (2696), 1117 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 2696 transitions. [2021-08-21 12:40:35,400 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 2696 transitions. Word has length 30 [2021-08-21 12:40:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:35,400 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 2696 transitions. [2021-08-21 12:40:35,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:40:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 2696 transitions. [2021-08-21 12:40:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:40:35,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:35,401 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:35,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 12:40:35,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:35,616 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1350351642, now seen corresponding path program 16 times [2021-08-21 12:40:35,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:35,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47969446] [2021-08-21 12:40:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:35,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:36,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:36,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47969446] [2021-08-21 12:40:36,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47969446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:36,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866148122] [2021-08-21 12:40:36,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:40:36,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:36,178 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:36,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:40:41,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:40:41,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:41,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:40:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:42,238 INFO L388 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 29 treesize of output 17 [2021-08-21 12:40:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:42,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866148122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:42,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:42,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-08-21 12:40:42,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635502761] [2021-08-21 12:40:42,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:40:42,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:42,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:40:42,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:40:42,334 INFO L87 Difference]: Start difference. First operand 1118 states and 2696 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:44,688 INFO L93 Difference]: Finished difference Result 2760 states and 6810 transitions. [2021-08-21 12:40:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:40:44,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:40:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:44,693 INFO L225 Difference]: With dead ends: 2760 [2021-08-21 12:40:44,693 INFO L226 Difference]: Without dead ends: 2740 [2021-08-21 12:40:44,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1860.8ms TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:40:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-08-21 12:40:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1122. [2021-08-21 12:40:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.416592328278323) internal successors, (2709), 1121 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2709 transitions. [2021-08-21 12:40:44,708 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2709 transitions. Word has length 30 [2021-08-21 12:40:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:44,708 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 2709 transitions. [2021-08-21 12:40:44,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2709 transitions. [2021-08-21 12:40:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:40:44,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:44,710 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:44,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:44,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-21 12:40:44,910 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1885795850, now seen corresponding path program 17 times [2021-08-21 12:40:44,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:44,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269572364] [2021-08-21 12:40:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:44,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:45,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:45,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269572364] [2021-08-21 12:40:45,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269572364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:45,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738087257] [2021-08-21 12:40:45,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:40:45,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:45,429 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:45,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:40:50,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:40:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:50,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:40:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:51,595 INFO L388 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 29 treesize of output 17 [2021-08-21 12:40:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:51,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738087257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:51,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:51,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:40:51,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238814772] [2021-08-21 12:40:51,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:40:51,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:40:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:40:51,703 INFO L87 Difference]: Start difference. First operand 1122 states and 2709 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:54,051 INFO L93 Difference]: Finished difference Result 2351 states and 5741 transitions. [2021-08-21 12:40:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:40:54,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:40:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:54,055 INFO L225 Difference]: With dead ends: 2351 [2021-08-21 12:40:54,055 INFO L226 Difference]: Without dead ends: 2331 [2021-08-21 12:40:54,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1784.4ms TimeCoverageRelationStatistics Valid=393, Invalid=1587, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:40:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-21 12:40:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1122. [2021-08-21 12:40:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.414808206958073) internal successors, (2707), 1121 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2707 transitions. [2021-08-21 12:40:54,072 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2707 transitions. Word has length 30 [2021-08-21 12:40:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:54,072 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 2707 transitions. [2021-08-21 12:40:54,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2707 transitions. [2021-08-21 12:40:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:40:54,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:54,074 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:54,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:54,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 12:40:54,274 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:40:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2004425308, now seen corresponding path program 18 times [2021-08-21 12:40:54,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:54,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708491949] [2021-08-21 12:40:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:54,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:54,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:54,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708491949] [2021-08-21 12:40:54,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708491949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:54,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224105828] [2021-08-21 12:40:54,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:40:54,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:54,813 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:40:54,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:41:00,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:41:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:00,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:41:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:01,053 INFO L388 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 29 treesize of output 17 [2021-08-21 12:41:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:01,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224105828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:01,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:41:01,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890893214] [2021-08-21 12:41:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:41:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:41:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:41:01,133 INFO L87 Difference]: Start difference. First operand 1122 states and 2707 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:03,594 INFO L93 Difference]: Finished difference Result 2402 states and 5862 transitions. [2021-08-21 12:41:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:41:03,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:41:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:03,597 INFO L225 Difference]: With dead ends: 2402 [2021-08-21 12:41:03,597 INFO L226 Difference]: Without dead ends: 2365 [2021-08-21 12:41:03,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1800.3ms TimeCoverageRelationStatistics Valid=362, Invalid=1444, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:41:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-08-21 12:41:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1113. [2021-08-21 12:41:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.411870503597122) internal successors, (2682), 1112 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2682 transitions. [2021-08-21 12:41:03,611 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2682 transitions. Word has length 30 [2021-08-21 12:41:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:03,611 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 2682 transitions. [2021-08-21 12:41:03,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2682 transitions. [2021-08-21 12:41:03,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:41:03,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:03,613 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:03,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 12:41:03,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:41:03,829 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:03,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1275517680, now seen corresponding path program 19 times [2021-08-21 12:41:03,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:03,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918836806] [2021-08-21 12:41:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:03,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:04,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:04,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918836806] [2021-08-21 12:41:04,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918836806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:04,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957257725] [2021-08-21 12:41:04,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:41:04,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:04,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:04,384 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:04,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:41:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:09,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:41:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:10,560 INFO L388 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 29 treesize of output 17 [2021-08-21 12:41:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957257725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:10,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:10,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-08-21 12:41:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247241929] [2021-08-21 12:41:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:41:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:41:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:41:10,657 INFO L87 Difference]: Start difference. First operand 1113 states and 2682 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:12,326 INFO L93 Difference]: Finished difference Result 2681 states and 6592 transitions. [2021-08-21 12:41:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:41:12,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:41:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:12,331 INFO L225 Difference]: With dead ends: 2681 [2021-08-21 12:41:12,331 INFO L226 Difference]: Without dead ends: 2670 [2021-08-21 12:41:12,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1157.9ms TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:41:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-08-21 12:41:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 1152. [2021-08-21 12:41:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.417897480451781) internal successors, (2783), 1151 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2783 transitions. [2021-08-21 12:41:12,350 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2783 transitions. Word has length 30 [2021-08-21 12:41:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:12,351 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 2783 transitions. [2021-08-21 12:41:12,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2783 transitions. [2021-08-21 12:41:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:41:12,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:12,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:12,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:12,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 12:41:12,569 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash 480883370, now seen corresponding path program 20 times [2021-08-21 12:41:12,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:12,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384699655] [2021-08-21 12:41:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:12,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:13,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:13,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384699655] [2021-08-21 12:41:13,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384699655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:13,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348152235] [2021-08-21 12:41:13,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:41:13,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:13,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:13,073 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:13,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:41:18,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:41:18,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:18,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:41:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:19,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:41:19,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-08-21 12:41:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:19,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348152235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:19,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:19,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 12:41:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726143842] [2021-08-21 12:41:19,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:41:19,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:41:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:41:19,802 INFO L87 Difference]: Start difference. First operand 1152 states and 2783 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:21,859 INFO L93 Difference]: Finished difference Result 2723 states and 6732 transitions. [2021-08-21 12:41:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:41:21,859 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:41:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:21,863 INFO L225 Difference]: With dead ends: 2723 [2021-08-21 12:41:21,863 INFO L226 Difference]: Without dead ends: 2711 [2021-08-21 12:41:21,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1674.8ms TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:41:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-08-21 12:41:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1187. [2021-08-21 12:41:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.4224283305227656) internal successors, (2873), 1186 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2873 transitions. [2021-08-21 12:41:21,878 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2873 transitions. Word has length 30 [2021-08-21 12:41:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:21,878 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 2873 transitions. [2021-08-21 12:41:21,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2873 transitions. [2021-08-21 12:41:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:41:21,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:21,880 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:21,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 12:41:22,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:22,080 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -437066820, now seen corresponding path program 21 times [2021-08-21 12:41:22,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:22,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536774891] [2021-08-21 12:41:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:22,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:22,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:22,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536774891] [2021-08-21 12:41:22,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536774891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:22,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244901835] [2021-08-21 12:41:22,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:41:22,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:22,599 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:22,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:41:28,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:41:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:28,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:41:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:28,947 INFO L388 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 29 treesize of output 17 [2021-08-21 12:41:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244901835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:29,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:29,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:41:29,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717688786] [2021-08-21 12:41:29,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:41:29,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:41:29,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:41:29,054 INFO L87 Difference]: Start difference. First operand 1187 states and 2873 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:31,305 INFO L93 Difference]: Finished difference Result 3068 states and 7544 transitions. [2021-08-21 12:41:31,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:41:31,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:41:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:31,309 INFO L225 Difference]: With dead ends: 3068 [2021-08-21 12:41:31,309 INFO L226 Difference]: Without dead ends: 3046 [2021-08-21 12:41:31,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1611.8ms TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:41:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-08-21 12:41:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1133. [2021-08-21 12:41:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.4151943462897525) internal successors, (2734), 1132 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2734 transitions. [2021-08-21 12:41:31,326 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2734 transitions. Word has length 30 [2021-08-21 12:41:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:31,326 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2734 transitions. [2021-08-21 12:41:31,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2734 transitions. [2021-08-21 12:41:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:41:31,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:31,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:31,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:31,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:31,528 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1016327578, now seen corresponding path program 22 times [2021-08-21 12:41:31,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:31,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566735497] [2021-08-21 12:41:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:31,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:32,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:32,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566735497] [2021-08-21 12:41:32,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566735497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:32,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058934007] [2021-08-21 12:41:32,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:41:32,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:32,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:32,105 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:32,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:41:37,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:41:37,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:37,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:41:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:38,579 INFO L388 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 29 treesize of output 17 [2021-08-21 12:41:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:38,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058934007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:38,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:38,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:41:38,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989263219] [2021-08-21 12:41:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:41:38,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:41:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:41:38,656 INFO L87 Difference]: Start difference. First operand 1133 states and 2734 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:40,442 INFO L93 Difference]: Finished difference Result 2438 states and 5934 transitions. [2021-08-21 12:41:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:41:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:41:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:40,446 INFO L225 Difference]: With dead ends: 2438 [2021-08-21 12:41:40,446 INFO L226 Difference]: Without dead ends: 2418 [2021-08-21 12:41:40,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1298.7ms TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:41:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-08-21 12:41:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 1131. [2021-08-21 12:41:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.4141592920353983) internal successors, (2728), 1130 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2728 transitions. [2021-08-21 12:41:40,460 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2728 transitions. Word has length 30 [2021-08-21 12:41:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:40,460 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2728 transitions. [2021-08-21 12:41:40,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2728 transitions. [2021-08-21 12:41:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:41:40,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:40,462 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:40,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:40,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 12:41:40,681 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash -621244878, now seen corresponding path program 23 times [2021-08-21 12:41:40,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:40,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464208358] [2021-08-21 12:41:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:40,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:41,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:41,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464208358] [2021-08-21 12:41:41,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464208358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:41,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060838055] [2021-08-21 12:41:41,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:41:41,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:41,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:41,401 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:41,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:41:47,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:41:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:47,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:41:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:47,946 INFO L388 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 29 treesize of output 17 [2021-08-21 12:41:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:48,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060838055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:48,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:48,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-08-21 12:41:48,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239613178] [2021-08-21 12:41:48,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:41:48,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:41:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:41:48,048 INFO L87 Difference]: Start difference. First operand 1131 states and 2728 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:50,153 INFO L93 Difference]: Finished difference Result 2531 states and 6149 transitions. [2021-08-21 12:41:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:41:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:41:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:50,157 INFO L225 Difference]: With dead ends: 2531 [2021-08-21 12:41:50,157 INFO L226 Difference]: Without dead ends: 2494 [2021-08-21 12:41:50,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1380.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1111, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:41:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-08-21 12:41:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 1116. [2021-08-21 12:41:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.411659192825112) internal successors, (2689), 1115 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2689 transitions. [2021-08-21 12:41:50,172 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2689 transitions. Word has length 30 [2021-08-21 12:41:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:50,172 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2689 transitions. [2021-08-21 12:41:50,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2689 transitions. [2021-08-21 12:41:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:41:50,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:50,174 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:50,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:41:50,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:50,374 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2040318064, now seen corresponding path program 24 times [2021-08-21 12:41:50,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:50,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507563461] [2021-08-21 12:41:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:50,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:50,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:50,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507563461] [2021-08-21 12:41:50,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507563461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:50,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859864637] [2021-08-21 12:41:50,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:41:50,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:50,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:50,887 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:41:50,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:41:56,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:41:56,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:56,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:41:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:57,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:41:57,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-08-21 12:41:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:57,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859864637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:57,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:57,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-21 12:41:57,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729953644] [2021-08-21 12:41:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:41:57,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:41:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:41:57,892 INFO L87 Difference]: Start difference. First operand 1116 states and 2689 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:41:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:59,488 INFO L93 Difference]: Finished difference Result 2495 states and 6098 transitions. [2021-08-21 12:41:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:41:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-08-21 12:41:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:59,492 INFO L225 Difference]: With dead ends: 2495 [2021-08-21 12:41:59,492 INFO L226 Difference]: Without dead ends: 2485 [2021-08-21 12:41:59,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1388.9ms TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:41:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-08-21 12:41:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1116. [2021-08-21 12:41:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.411659192825112) internal successors, (2689), 1115 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2689 transitions. [2021-08-21 12:41:59,506 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2689 transitions. Word has length 30 [2021-08-21 12:41:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:59,506 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2689 transitions. [2021-08-21 12:41:59,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2021-08-21 12:41:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2689 transitions. [2021-08-21 12:41:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:41:59,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:59,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:59,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 12:41:59,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:59,708 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:41:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash 797633524, now seen corresponding path program 1 times [2021-08-21 12:41:59,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:59,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443232863] [2021-08-21 12:41:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:59,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:00,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:00,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443232863] [2021-08-21 12:42:00,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443232863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:00,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111596985] [2021-08-21 12:42:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:00,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:00,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:00,270 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:42:00,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:42:00,622 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:42:00,636 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 [2021-08-21 12:42:01,624 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:42:01,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 12:42:01,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 12:42:01,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-21 12:42:01,825 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while executing Executor. [2021-08-21 12:42:01,826 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:42:01,826 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:42:01,830 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:42:01,830 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:42:01,832 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:42:01 BasicIcfg [2021-08-21 12:42:01,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:42:01,832 INFO L168 Benchmark]: Toolchain (without parser) took 720148.09 ms. Allocated memory was 202.4 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 182.8 MB in the beginning and 1.0 GB in the end (delta: -827.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-21 12:42:01,833 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 202.4 MB. Free memory was 184.0 MB in the beginning and 183.9 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:42:01,833 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.33 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:42:01,833 INFO L168 Benchmark]: Boogie Preprocessor took 14.45 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 180.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:42:01,833 INFO L168 Benchmark]: RCFGBuilder took 286.57 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 167.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:42:01,833 INFO L168 Benchmark]: TraceAbstraction took 719820.30 ms. Allocated memory was 202.4 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 167.5 MB in the beginning and 1.0 GB in the end (delta: -842.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-21 12:42:01,834 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 0.12 ms. Allocated memory is still 202.4 MB. Free memory was 184.0 MB in the beginning and 183.9 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.33 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.45 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 180.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 286.57 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 167.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 719820.30 ms. Allocated memory was 202.4 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 167.5 MB in the beginning and 1.0 GB in the end (delta: -842.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 719686.1ms, OverallIterations: 120, TraceHistogramMax: 2, EmptinessCheckTime: 181.6ms, AutomataDifference: 255597.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3274 SDtfs, 27696 SDslu, 23208 SDs, 0 SdLazy, 116948 SolverSat, 12944 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 139603.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6745 GetRequests, 2443 SyntacticMatches, 290 SemanticMatches, 4012 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45084 ImplicationChecksByTransitivity, 142125.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1187occurred in iteration=115, InterpolantAutomatonStates: 3245, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1898.4ms AutomataMinimizationTime, 119 MinimizatonAttempts, 144183 StatesRemovedByMinimization, 119 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 373.2ms SsaConstructionTime, 1720.7ms SatisfiabilityAnalysisTime, 123616.4ms InterpolantComputationTime, 6640 NumberOfCodeBlocks, 6628 NumberOfCodeBlocksAsserted, 411 NumberOfCheckSat, 6404 ConstructedInterpolants, 83 QuantifiedInterpolants, 131234 SizeOfPredicates, 798 NumberOfNonLiveVariables, 6876 ConjunctsInSsa, 3168 ConjunctsInUnsatCore, 236 InterpolantComputations, 2 PerfectInterpolantSequences, 92/2497 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